diff --git a/.github/workflows/build-and-test.sh b/.github/workflows/build-and-test.sh
index 56c5bd0..2d913b0 100644
--- a/.github/workflows/build-and-test.sh
+++ b/.github/workflows/build-and-test.sh
@@ -1,11 +1,19 @@
 #! /bin/bash
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 set -e
 
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 47c2401..a98124e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 name: CI tests
 
diff --git a/.github/workflows/common.sh b/.github/workflows/common.sh
index 6600b73..9d51570 100644
--- a/.github/workflows/common.sh
+++ b/.github/workflows/common.sh
@@ -1,11 +1,19 @@
 #! /bin/bash
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 # Look for location binaries first
 export PATH="$HOME/.local-bin/bin:$PATH"
diff --git a/.github/workflows/format-check.sh b/.github/workflows/format-check.sh
index 2fd9076..930ff57 100644
--- a/.github/workflows/format-check.sh
+++ b/.github/workflows/format-check.sh
@@ -1,11 +1,19 @@
 #! /bin/bash
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 set -e
 
diff --git a/.github/workflows/licensing.yml b/.github/workflows/licensing.yml
index 9e49d75..60e54f6 100644
--- a/.github/workflows/licensing.yml
+++ b/.github/workflows/licensing.yml
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 name: Licensing
 
diff --git a/.github/workflows/setup.sh b/.github/workflows/setup.sh
index a1277ca..38bcf3f 100644
--- a/.github/workflows/setup.sh
+++ b/.github/workflows/setup.sh
@@ -1,11 +1,19 @@
 #! /bin/bash
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 set -e
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index e92bb22..03d6c83 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -9,8 +9,8 @@
 ### License
 
 All software (code, associated documentation, support files, etc) in the Yosys F4PGA Plugins repository are licensed
-under the very permissive [ISC Licence](COPYING).
-A copy can be found in the [`COPYING`](COPYING) file.
+under the very permissive [Apache-2.0 Licence](LICENSE).
+A copy can be found in the [`LICENSE`](LICENSE) file.
 
 All new contributions must also be released under this license.
 
diff --git a/COPYING b/COPYING
deleted file mode 100644
index bd8747f..0000000
--- a/COPYING
+++ /dev/null
@@ -1,13 +0,0 @@
-Copyright (C) 2019-2022 The SymbiFlow Authors. All rights reserved.
-
-Permission to use, copy, modify, and/or distribute this software for any
-purpose with or without fee is hereby granted, provided that the above
-copyright notice and this permission notice appear in all copies.
-
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
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+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
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+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+      institute patent litigation against any entity (including a
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+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
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+
+   4. Redistribution. You may reproduce and distribute copies of the
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
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+
+      (d) If the Work includes a "NOTICE" text file as part of its
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+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/Makefile b/Makefile
index e24f599..044fe00 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 PLUGIN_LIST := fasm xdc params sdc ql-iob design_introspection integrateinv ql-qlf systemverilog uhdm dsp-ff
 PLUGINS := $(foreach plugin,$(PLUGIN_LIST),$(plugin).so)
diff --git a/common/bank_tiles.h b/common/bank_tiles.h
index f2d4f5e..e15753b 100644
--- a/common/bank_tiles.h
+++ b/common/bank_tiles.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #include "kernel/log.h"
diff --git a/design_introspection-plugin/Makefile b/design_introspection-plugin/Makefile
index 8835c56..604254e 100644
--- a/design_introspection-plugin/Makefile
+++ b/design_introspection-plugin/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 NAME = design_introspection
 SOURCES = design_introspection.cc \
diff --git a/design_introspection-plugin/design_introspection.cc b/design_introspection-plugin/design_introspection.cc
index ef2d73d..b5193bf 100644
--- a/design_introspection-plugin/design_introspection.cc
+++ b/design_introspection-plugin/design_introspection.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 
diff --git a/design_introspection-plugin/get_cells.cc b/design_introspection-plugin/get_cells.cc
index d8cf76a..ae4e82c 100644
--- a/design_introspection-plugin/get_cells.cc
+++ b/design_introspection-plugin/get_cells.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #include "get_cells.h"
diff --git a/design_introspection-plugin/get_cells.h b/design_introspection-plugin/get_cells.h
index 94bb268..c34da79 100644
--- a/design_introspection-plugin/get_cells.h
+++ b/design_introspection-plugin/get_cells.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #ifndef _GET_CELLS_H_
diff --git a/design_introspection-plugin/get_cmd.h b/design_introspection-plugin/get_cmd.h
index 389ea77..03a3771 100644
--- a/design_introspection-plugin/get_cmd.h
+++ b/design_introspection-plugin/get_cmd.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #ifndef _GET_CMD_H_
diff --git a/design_introspection-plugin/get_count.cc b/design_introspection-plugin/get_count.cc
index e7d3535..850d3f6 100644
--- a/design_introspection-plugin/get_count.cc
+++ b/design_introspection-plugin/get_count.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 
diff --git a/design_introspection-plugin/get_count.h b/design_introspection-plugin/get_count.h
index e51d5cc..837fe62 100644
--- a/design_introspection-plugin/get_count.h
+++ b/design_introspection-plugin/get_count.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #ifndef _GET_COUNT_H_
diff --git a/design_introspection-plugin/get_nets.cc b/design_introspection-plugin/get_nets.cc
index 8092387..27e643a 100644
--- a/design_introspection-plugin/get_nets.cc
+++ b/design_introspection-plugin/get_nets.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #include "get_nets.h"
diff --git a/design_introspection-plugin/get_nets.h b/design_introspection-plugin/get_nets.h
index 3de1a0d..b2c5dab 100644
--- a/design_introspection-plugin/get_nets.h
+++ b/design_introspection-plugin/get_nets.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #ifndef _GET_NETS_H_
diff --git a/design_introspection-plugin/get_pins.cc b/design_introspection-plugin/get_pins.cc
index 45f7d88..6fa8b59 100644
--- a/design_introspection-plugin/get_pins.cc
+++ b/design_introspection-plugin/get_pins.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #include "get_pins.h"
diff --git a/design_introspection-plugin/get_pins.h b/design_introspection-plugin/get_pins.h
index a42063e..8b66c52 100644
--- a/design_introspection-plugin/get_pins.h
+++ b/design_introspection-plugin/get_pins.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #ifndef _GET_PINS_H_
diff --git a/design_introspection-plugin/get_ports.cc b/design_introspection-plugin/get_ports.cc
index 56e9da4..6f3e702 100644
--- a/design_introspection-plugin/get_ports.cc
+++ b/design_introspection-plugin/get_ports.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #include "get_ports.h"
diff --git a/design_introspection-plugin/get_ports.h b/design_introspection-plugin/get_ports.h
index e694173..32662b9 100644
--- a/design_introspection-plugin/get_ports.h
+++ b/design_introspection-plugin/get_ports.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #ifndef _GET_PORTS_H_
diff --git a/design_introspection-plugin/selection_to_tcl_list.cc b/design_introspection-plugin/selection_to_tcl_list.cc
index eeb76ff..fa1158a 100644
--- a/design_introspection-plugin/selection_to_tcl_list.cc
+++ b/design_introspection-plugin/selection_to_tcl_list.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #include "selection_to_tcl_list.h"
 
diff --git a/design_introspection-plugin/selection_to_tcl_list.h b/design_introspection-plugin/selection_to_tcl_list.h
index 87d5056..bbc4acb 100644
--- a/design_introspection-plugin/selection_to_tcl_list.h
+++ b/design_introspection-plugin/selection_to_tcl_list.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #ifndef _SELECTION_TO_TCL_LIST_H_
 #define _SELECTION_TO_TCL_LIST_H_
diff --git a/design_introspection-plugin/tests/Makefile b/design_introspection-plugin/tests/Makefile
index fcfb562..4e6455f 100644
--- a/design_introspection-plugin/tests/Makefile
+++ b/design_introspection-plugin/tests/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 TESTS = get_nets \
 	get_ports \
diff --git a/design_introspection-plugin/tests/get_cells/get_cells.v b/design_introspection-plugin/tests/get_cells/get_cells.v
index 2fb3ffe..c0a51ff 100644
--- a/design_introspection-plugin/tests/get_cells/get_cells.v
+++ b/design_introspection-plugin/tests/get_cells/get_cells.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     (* async_reg = "true", mr_ff = "true", dont_touch = "true" *) input clk,
diff --git a/design_introspection-plugin/tests/get_count/Makefile b/design_introspection-plugin/tests/get_count/Makefile
index 36ab99c..250eec3 100644
--- a/design_introspection-plugin/tests/get_count/Makefile
+++ b/design_introspection-plugin/tests/get_count/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 test:
 	yosys -p "tcl script.tcl"
diff --git a/design_introspection-plugin/tests/get_count/get_count.v b/design_introspection-plugin/tests/get_count/get_count.v
index a57d331..18aea44 100644
--- a/design_introspection-plugin/tests/get_count/get_count.v
+++ b/design_introspection-plugin/tests/get_count/get_count.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module my_gate (
     input  wire A,
diff --git a/design_introspection-plugin/tests/get_nets/get_nets.v b/design_introspection-plugin/tests/get_nets/get_nets.v
index afc56d8..d8a6411 100644
--- a/design_introspection-plugin/tests/get_nets/get_nets.v
+++ b/design_introspection-plugin/tests/get_nets/get_nets.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     (* async_reg = "true", mr_ff = "true", dont_touch = "true" *) input clk,
diff --git a/design_introspection-plugin/tests/get_pins/get_pins.v b/design_introspection-plugin/tests/get_pins/get_pins.v
index 3976199..d4d3b50 100644
--- a/design_introspection-plugin/tests/get_pins/get_pins.v
+++ b/design_introspection-plugin/tests/get_pins/get_pins.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     (* async_reg = "true", mr_ff = "true", dont_touch = "true" *) input clk,
diff --git a/design_introspection-plugin/tests/get_ports/get_ports.v b/design_introspection-plugin/tests/get_ports/get_ports.v
index afc56d8..d8a6411 100644
--- a/design_introspection-plugin/tests/get_ports/get_ports.v
+++ b/design_introspection-plugin/tests/get_ports/get_ports.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     (* async_reg = "true", mr_ff = "true", dont_touch = "true" *) input clk,
diff --git a/dsp-ff-plugin/Makefile b/dsp-ff-plugin/Makefile
index c64565d..9cd9800 100644
--- a/dsp-ff-plugin/Makefile
+++ b/dsp-ff-plugin/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 NAME = dsp-ff
 SOURCES = dsp_ff.cc 
diff --git a/dsp-ff-plugin/nexus-dsp_rules.txt b/dsp-ff-plugin/nexus-dsp_rules.txt
index 596d60a..d21ea5d 100644
--- a/dsp-ff-plugin/nexus-dsp_rules.txt
+++ b/dsp-ff-plugin/nexus-dsp_rules.txt
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 dsp MULT9X9 MULT18X18 MULT18X36 MULT36X36
   port A SIGNEDA
diff --git a/dsp-ff-plugin/tests/Makefile b/dsp-ff-plugin/tests/Makefile
index 99953a4..3a883f9 100644
--- a/dsp-ff-plugin/tests/Makefile
+++ b/dsp-ff-plugin/tests/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 TESTS = \
     nexus_mult \
diff --git a/dsp-ff-plugin/tests/nexus_conn_conflict/nexus_conn_conflict.v b/dsp-ff-plugin/tests/nexus_conn_conflict/nexus_conn_conflict.v
index 0c03865..18fce91 100644
--- a/dsp-ff-plugin/tests/nexus_conn_conflict/nexus_conn_conflict.v
+++ b/dsp-ff-plugin/tests/nexus_conn_conflict/nexus_conn_conflict.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module conflict_dsp_clk (
     input  wire        CLK_A,
diff --git a/dsp-ff-plugin/tests/nexus_conn_share/nexus_conn_share.v b/dsp-ff-plugin/tests/nexus_conn_share/nexus_conn_share.v
index ef06483..db020c3 100644
--- a/dsp-ff-plugin/tests/nexus_conn_share/nexus_conn_share.v
+++ b/dsp-ff-plugin/tests/nexus_conn_share/nexus_conn_share.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module conflict_out_fanout (
     input  wire        CLK,
diff --git a/dsp-ff-plugin/tests/nexus_fftypes/nexus_fftypes.v b/dsp-ff-plugin/tests/nexus_fftypes/nexus_fftypes.v
index 2a49bfc..b0eb3c8 100644
--- a/dsp-ff-plugin/tests/nexus_fftypes/nexus_fftypes.v
+++ b/dsp-ff-plugin/tests/nexus_fftypes/nexus_fftypes.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module mult_ena (
     input  wire        CLK,
diff --git a/dsp-ff-plugin/tests/nexus_mult/nexus_mult.v b/dsp-ff-plugin/tests/nexus_mult/nexus_mult.v
index 315cd1e..e6281d6 100644
--- a/dsp-ff-plugin/tests/nexus_mult/nexus_mult.v
+++ b/dsp-ff-plugin/tests/nexus_mult/nexus_mult.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module mult_ireg (
     input  wire        CLK,
diff --git a/dsp-ff-plugin/tests/nexus_mult_wide/nexus_mult_wide.v b/dsp-ff-plugin/tests/nexus_mult_wide/nexus_mult_wide.v
index 3a5fbe5..38161c6 100644
--- a/dsp-ff-plugin/tests/nexus_mult_wide/nexus_mult_wide.v
+++ b/dsp-ff-plugin/tests/nexus_mult_wide/nexus_mult_wide.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module mult_wide (
     input  wire        CLK,
diff --git a/dsp-ff-plugin/tests/nexus_param_conflict/nexus_param_conflict.v b/dsp-ff-plugin/tests/nexus_param_conflict/nexus_param_conflict.v
index 5f4756f..5269dea 100644
--- a/dsp-ff-plugin/tests/nexus_param_conflict/nexus_param_conflict.v
+++ b/dsp-ff-plugin/tests/nexus_param_conflict/nexus_param_conflict.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module conflict_dsp_ctrl_param (
     input  wire        CLK,
diff --git a/environment.yml b/environment.yml
index 52f3ddb..e351c1e 100644
--- a/environment.yml
+++ b/environment.yml
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 name: yosys-plugins
 channels:
diff --git a/fasm-plugin/Makefile b/fasm-plugin/Makefile
index 770cff7..b149198 100644
--- a/fasm-plugin/Makefile
+++ b/fasm-plugin/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 NAME = fasm
 SOURCES = fasm.cc
diff --git a/fasm-plugin/fasm.cc b/fasm-plugin/fasm.cc
index f0e20f5..135390f 100644
--- a/fasm-plugin/fasm.cc
+++ b/fasm-plugin/fasm.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  *  ---
  *
diff --git a/fasm-plugin/tests/Makefile b/fasm-plugin/tests/Makefile
index 76892a2..1c6f1d8 100644
--- a/fasm-plugin/tests/Makefile
+++ b/fasm-plugin/tests/Makefile
@@ -1,9 +1,17 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 include $(shell pwd)/../../Makefile_test.common
diff --git a/integrateinv-plugin/Makefile b/integrateinv-plugin/Makefile
index 410d990..f93225a 100644
--- a/integrateinv-plugin/Makefile
+++ b/integrateinv-plugin/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 NAME = integrateinv
 SOURCES = integrateinv.cc
diff --git a/integrateinv-plugin/integrateinv.cc b/integrateinv-plugin/integrateinv.cc
index 0e998ed..a47dcea 100644
--- a/integrateinv-plugin/integrateinv.cc
+++ b/integrateinv-plugin/integrateinv.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 
diff --git a/integrateinv-plugin/tests/Makefile b/integrateinv-plugin/tests/Makefile
index 0c7dce1..fc6e87b 100644
--- a/integrateinv-plugin/tests/Makefile
+++ b/integrateinv-plugin/tests/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 TESTS = fanout \
 	hierarchy \
diff --git a/integrateinv-plugin/tests/fanout/fanout.v b/integrateinv-plugin/tests/fanout/fanout.v
index df77b4b..f301118 100644
--- a/integrateinv-plugin/tests/fanout/fanout.v
+++ b/integrateinv-plugin/tests/fanout/fanout.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* blackbox *)
 module box(
diff --git a/integrateinv-plugin/tests/hierarchy/hierarchy.v b/integrateinv-plugin/tests/hierarchy/hierarchy.v
index def4b72..32c451d 100644
--- a/integrateinv-plugin/tests/hierarchy/hierarchy.v
+++ b/integrateinv-plugin/tests/hierarchy/hierarchy.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* blackbox *)
 module box(
diff --git a/integrateinv-plugin/tests/multi_bit/multi_bit.v b/integrateinv-plugin/tests/multi_bit/multi_bit.v
index 401e70d..1515b17 100644
--- a/integrateinv-plugin/tests/multi_bit/multi_bit.v
+++ b/integrateinv-plugin/tests/multi_bit/multi_bit.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* blackbox *)
 module box(
diff --git a/integrateinv-plugin/tests/single_bit/single_bit.v b/integrateinv-plugin/tests/single_bit/single_bit.v
index 087145b..2e0739e 100644
--- a/integrateinv-plugin/tests/single_bit/single_bit.v
+++ b/integrateinv-plugin/tests/single_bit/single_bit.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* blackbox *)
 module box(
diff --git a/integrateinv-plugin/tests/toplevel/toplevel.v b/integrateinv-plugin/tests/toplevel/toplevel.v
index e79e246..8c21731 100644
--- a/integrateinv-plugin/tests/toplevel/toplevel.v
+++ b/integrateinv-plugin/tests/toplevel/toplevel.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* blackbox *)
 module box(
diff --git a/params-plugin/Makefile b/params-plugin/Makefile
index 8a25338..9740c7b 100644
--- a/params-plugin/Makefile
+++ b/params-plugin/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 NAME = params
 SOURCES = params.cc
diff --git a/params-plugin/params.cc b/params-plugin/params.cc
index e53ac85..e4c944d 100644
--- a/params-plugin/params.cc
+++ b/params-plugin/params.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #include "kernel/log.h"
 #include "kernel/register.h"
diff --git a/params-plugin/tests/Makefile b/params-plugin/tests/Makefile
index 9576f93..610074d 100644
--- a/params-plugin/tests/Makefile
+++ b/params-plugin/tests/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 TESTS = pll
 include $(shell pwd)/../../Makefile_test.common
diff --git a/params-plugin/tests/compare_output_json.py b/params-plugin/tests/compare_output_json.py
index fed0768..d9c4e01 100644
--- a/params-plugin/tests/compare_output_json.py
+++ b/params-plugin/tests/compare_output_json.py
@@ -1,13 +1,21 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 """
 
 This script extracts the top module cells and their corresponding parameters
diff --git a/params-plugin/tests/pll/pll.v b/params-plugin/tests/pll/pll.v
index e97901f..fbdc77e 100644
--- a/params-plugin/tests/pll/pll.v
+++ b/params-plugin/tests/pll/pll.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     (* dont_touch = "true" *) input clk100,
diff --git a/params-plugin/tests/pll/techmaps/cells_map.v b/params-plugin/tests/pll/techmaps/cells_map.v
index 90d637d..19b67dd 100644
--- a/params-plugin/tests/pll/techmaps/cells_map.v
+++ b/params-plugin/tests/pll/techmaps/cells_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 // ============================================================================
 // CMT
diff --git a/params-plugin/tests/pll/techmaps/cells_sim.v b/params-plugin/tests/pll/techmaps/cells_sim.v
index f1c76e5..aa842f1 100644
--- a/params-plugin/tests/pll/techmaps/cells_sim.v
+++ b/params-plugin/tests/pll/techmaps/cells_sim.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 // ============================================================================
 // CMT
diff --git a/ql-iob-plugin/Makefile b/ql-iob-plugin/Makefile
index 7a7e1cf..dc89757 100644
--- a/ql-iob-plugin/Makefile
+++ b/ql-iob-plugin/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 NAME = ql-iob
 SOURCES = ql-iob.cc pcf_parser.cc pinmap_parser.cc
diff --git a/ql-iob-plugin/pcf_parser.cc b/ql-iob-plugin/pcf_parser.cc
index d8acb03..dfcad9e 100644
--- a/ql-iob-plugin/pcf_parser.cc
+++ b/ql-iob-plugin/pcf_parser.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #include "pcf_parser.hh"
diff --git a/ql-iob-plugin/pcf_parser.hh b/ql-iob-plugin/pcf_parser.hh
index 6a769a1..7324ee3 100644
--- a/ql-iob-plugin/pcf_parser.hh
+++ b/ql-iob-plugin/pcf_parser.hh
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #ifndef PCF_PARSER_HH
diff --git a/ql-iob-plugin/pinmap_parser.cc b/ql-iob-plugin/pinmap_parser.cc
index 0231bb8..8f228ff 100644
--- a/ql-iob-plugin/pinmap_parser.cc
+++ b/ql-iob-plugin/pinmap_parser.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #include "pinmap_parser.hh"
diff --git a/ql-iob-plugin/pinmap_parser.hh b/ql-iob-plugin/pinmap_parser.hh
index 6af04d5..781ca83 100644
--- a/ql-iob-plugin/pinmap_parser.hh
+++ b/ql-iob-plugin/pinmap_parser.hh
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #ifndef PINMAP_PARSER_HH
diff --git a/ql-iob-plugin/ql-iob.cc b/ql-iob-plugin/ql-iob.cc
index 6b9ca91..cc36304 100644
--- a/ql-iob-plugin/ql-iob.cc
+++ b/ql-iob-plugin/ql-iob.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 
diff --git a/ql-iob-plugin/tests/Makefile b/ql-iob-plugin/tests/Makefile
index 596e07e..5e6bc92 100644
--- a/ql-iob-plugin/tests/Makefile
+++ b/ql-iob-plugin/tests/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 TESTS = sdiomux ckpad
 
diff --git a/ql-iob-plugin/tests/ckpad/Makefile b/ql-iob-plugin/tests/ckpad/Makefile
index 52de757..9a2e2d3 100644
--- a/ql-iob-plugin/tests/ckpad/Makefile
+++ b/ql-iob-plugin/tests/ckpad/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 # TODO: Integrate this in the Makefile_test.command environment ?
 test:
diff --git a/ql-iob-plugin/tests/ckpad/design.v b/ql-iob-plugin/tests/ckpad/design.v
index 25fb8f7..e717ac9 100644
--- a/ql-iob-plugin/tests/ckpad/design.v
+++ b/ql-iob-plugin/tests/ckpad/design.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input wire clk0,
diff --git a/ql-iob-plugin/tests/common/pp3_cells_map.v b/ql-iob-plugin/tests/common/pp3_cells_map.v
index 2bd7235..2b9592e 100644
--- a/ql-iob-plugin/tests/common/pp3_cells_map.v
+++ b/ql-iob-plugin/tests/common/pp3_cells_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module \$_DFF_P_ (
     D,
diff --git a/ql-iob-plugin/tests/common/pp3_cells_sim.v b/ql-iob-plugin/tests/common/pp3_cells_sim.v
index 367ea61..8167f47 100644
--- a/ql-iob-plugin/tests/common/pp3_cells_sim.v
+++ b/ql-iob-plugin/tests/common/pp3_cells_sim.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module inpad (
     output Q,
diff --git a/ql-iob-plugin/tests/sdiomux/Makefile b/ql-iob-plugin/tests/sdiomux/Makefile
index 52de757..9a2e2d3 100644
--- a/ql-iob-plugin/tests/sdiomux/Makefile
+++ b/ql-iob-plugin/tests/sdiomux/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 # TODO: Integrate this in the Makefile_test.command environment ?
 test:
diff --git a/ql-iob-plugin/tests/sdiomux/design.v b/ql-iob-plugin/tests/sdiomux/design.v
index 617797b..e7e4976 100644
--- a/ql-iob-plugin/tests/sdiomux/design.v
+++ b/ql-iob-plugin/tests/sdiomux/design.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input  wire       clk,
diff --git a/ql-qlf-plugin/Makefile b/ql-qlf-plugin/Makefile
index d51c146..30200bf 100644
--- a/ql-qlf-plugin/Makefile
+++ b/ql-qlf-plugin/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 NAME = ql-qlf
 SOURCES = synth_quicklogic.cc \
diff --git a/ql-qlf-plugin/common/cells_sim.v b/ql-qlf-plugin/common/cells_sim.v
index 6967a09..95bc86b 100644
--- a/ql-qlf-plugin/common/cells_sim.v
+++ b/ql-qlf-plugin/common/cells_sim.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 
 module inv (
diff --git a/ql-qlf-plugin/pp3/abc9_map.v b/ql-qlf-plugin/pp3/abc9_map.v
index 86e14d7..8b342f6 100644
--- a/ql-qlf-plugin/pp3/abc9_map.v
+++ b/ql-qlf-plugin/pp3/abc9_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 // This file exists to map purely-synchronous flops to ABC9 flops, while 
 // mapping flops with asynchronous-set/clear as boxes, this is because ABC9 
diff --git a/ql-qlf-plugin/pp3/abc9_model.v b/ql-qlf-plugin/pp3/abc9_model.v
index 9d2b198..a8b03e7 100644
--- a/ql-qlf-plugin/pp3/abc9_model.v
+++ b/ql-qlf-plugin/pp3/abc9_model.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* abc9_flop, lib_whitebox *)
 module $__PP3_DFFEPC_SYNCONLY (
diff --git a/ql-qlf-plugin/pp3/abc9_unmap.v b/ql-qlf-plugin/pp3/abc9_unmap.v
index f9262b8..29a1adf 100644
--- a/ql-qlf-plugin/pp3/abc9_unmap.v
+++ b/ql-qlf-plugin/pp3/abc9_unmap.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 module $__PP3_DFFEPC_SYNCONLY (
   output Q,
   input D,
diff --git a/ql-qlf-plugin/pp3/brams_map.v b/ql-qlf-plugin/pp3/brams_map.v
index 07b65b7..c0ebb39 100644
--- a/ql-qlf-plugin/pp3/brams_map.v
+++ b/ql-qlf-plugin/pp3/brams_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module \$__QUICKLOGIC_RAMB16K (
     CLK2,
diff --git a/ql-qlf-plugin/pp3/brams_sim.v b/ql-qlf-plugin/pp3/brams_sim.v
index 0981c7a..1b15256 100644
--- a/ql-qlf-plugin/pp3/brams_sim.v
+++ b/ql-qlf-plugin/pp3/brams_sim.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 `timescale 1ns / 10ps
 module fifo_controller_model (
diff --git a/ql-qlf-plugin/pp3/cells_map.v b/ql-qlf-plugin/pp3/cells_map.v
index 625b2c5..bd3d36e 100644
--- a/ql-qlf-plugin/pp3/cells_map.v
+++ b/ql-qlf-plugin/pp3/cells_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module \$_MUX8_ (
     A,
diff --git a/ql-qlf-plugin/pp3/cells_sim.v b/ql-qlf-plugin/pp3/cells_sim.v
index 71c98c6..cb56a52 100644
--- a/ql-qlf-plugin/pp3/cells_sim.v
+++ b/ql-qlf-plugin/pp3/cells_sim.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module inv (
     output Q,
diff --git a/ql-qlf-plugin/pp3/ffs_map.v b/ql-qlf-plugin/pp3/ffs_map.v
index c023fc1..b26e6a6 100644
--- a/ql-qlf-plugin/pp3/ffs_map.v
+++ b/ql-qlf-plugin/pp3/ffs_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module \$_DFFSRE_PPPP_ (
     input  C,
diff --git a/ql-qlf-plugin/pp3/latches_map.v b/ql-qlf-plugin/pp3/latches_map.v
index e7825a7..514d9cd 100644
--- a/ql-qlf-plugin/pp3/latches_map.v
+++ b/ql-qlf-plugin/pp3/latches_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module \$_DLATCH_P_ (E, D, Q);
   wire [1023:0] _TECHMAP_DO_ = "simplemap; opt";
diff --git a/ql-qlf-plugin/pp3/lut_map.v b/ql-qlf-plugin/pp3/lut_map.v
index 867a963..a7b2a7c 100644
--- a/ql-qlf-plugin/pp3/lut_map.v
+++ b/ql-qlf-plugin/pp3/lut_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module \$lut (
     A,
diff --git a/ql-qlf-plugin/pp3/mult_sim.v b/ql-qlf-plugin/pp3/mult_sim.v
index 432e485..d46ddc0 100644
--- a/ql-qlf-plugin/pp3/mult_sim.v
+++ b/ql-qlf-plugin/pp3/mult_sim.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* blackbox *)
 module qlal4s3_mult_32x32_cell (
diff --git a/ql-qlf-plugin/pp3/qlal3_sim.v b/ql-qlf-plugin/pp3/qlal3_sim.v
index e801df7..c1380e5 100644
--- a/ql-qlf-plugin/pp3/qlal3_sim.v
+++ b/ql-qlf-plugin/pp3/qlal3_sim.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* blackbox *)
 (* keep *)
diff --git a/ql-qlf-plugin/pp3/qlal4s3b_sim.v b/ql-qlf-plugin/pp3/qlal4s3b_sim.v
index 68a37fc..39184a8 100644
--- a/ql-qlf-plugin/pp3/qlal4s3b_sim.v
+++ b/ql-qlf-plugin/pp3/qlal4s3b_sim.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 `timescale 1ns / 10ps
 module ahb_gen_bfm (
diff --git a/ql-qlf-plugin/pp3_braminit.cc b/ql-qlf-plugin/pp3_braminit.cc
index 0c9b860..459f3cf 100644
--- a/ql-qlf-plugin/pp3_braminit.cc
+++ b/ql-qlf-plugin/pp3_braminit.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 
diff --git a/ql-qlf-plugin/ql-dsp-simd.cc b/ql-qlf-plugin/ql-dsp-simd.cc
index d70e2a6..ba40c07 100644
--- a/ql-qlf-plugin/ql-dsp-simd.cc
+++ b/ql-qlf-plugin/ql-dsp-simd.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors.
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier:ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 #include "kernel/log.h"
diff --git a/ql-qlf-plugin/ql-dsp.cc b/ql-qlf-plugin/ql-dsp.cc
index fe5a986..4e8e2c6 100644
--- a/ql-qlf-plugin/ql-dsp.cc
+++ b/ql-qlf-plugin/ql-dsp.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 
diff --git a/ql-qlf-plugin/ql-edif.cc b/ql-qlf-plugin/ql-edif.cc
index a6bed4c..4633a10 100644
--- a/ql-qlf-plugin/ql-edif.cc
+++ b/ql-qlf-plugin/ql-edif.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 
diff --git a/ql-qlf-plugin/qlf_k4n8/arith_map.v b/ql-qlf-plugin/qlf_k4n8/arith_map.v
index 6e3ee6d..564b721 100644
--- a/ql-qlf-plugin/qlf_k4n8/arith_map.v
+++ b/ql-qlf-plugin/qlf_k4n8/arith_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* techmap_celltype = "$alu" *)
 module _80_quicklogic_alu (A, B, CI, BI, X, Y, CO);
diff --git a/ql-qlf-plugin/qlf_k4n8/cells_sim.v b/ql-qlf-plugin/qlf_k4n8/cells_sim.v
index 96caadd..4ec10f2 100644
--- a/ql-qlf-plugin/qlf_k4n8/cells_sim.v
+++ b/ql-qlf-plugin/qlf_k4n8/cells_sim.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* abc9_box, lib_whitebox *)
 module adder_lut4(
diff --git a/ql-qlf-plugin/qlf_k4n8/ffs_map.v b/ql-qlf-plugin/qlf_k4n8/ffs_map.v
index cd8837b..61fab5f 100644
--- a/ql-qlf-plugin/qlf_k4n8/ffs_map.v
+++ b/ql-qlf-plugin/qlf_k4n8/ffs_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module \$_DFF_P_ (D, Q, C);
     input D;
diff --git a/ql-qlf-plugin/qlf_k6n10/arith_map.v b/ql-qlf-plugin/qlf_k6n10/arith_map.v
index d8d4665..092120f 100644
--- a/ql-qlf-plugin/qlf_k6n10/arith_map.v
+++ b/ql-qlf-plugin/qlf_k6n10/arith_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 //////////////////////////
 //      arithmetic      //
diff --git a/ql-qlf-plugin/qlf_k6n10/brams_map.v b/ql-qlf-plugin/qlf_k6n10/brams_map.v
index f363805..a22685c 100644
--- a/ql-qlf-plugin/qlf_k6n10/brams_map.v
+++ b/ql-qlf-plugin/qlf_k6n10/brams_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 
 module \$__QLF_RAM16K (
diff --git a/ql-qlf-plugin/qlf_k6n10/cells_sim.v b/ql-qlf-plugin/qlf_k6n10/cells_sim.v
index d015c8a..ab875f1 100644
--- a/ql-qlf-plugin/qlf_k6n10/cells_sim.v
+++ b/ql-qlf-plugin/qlf_k6n10/cells_sim.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* abc9_box, lib_whitebox *)
 module adder(
diff --git a/ql-qlf-plugin/qlf_k6n10/dsp_map.v b/ql-qlf-plugin/qlf_k6n10/dsp_map.v
index 49d5e23..aa98429 100644
--- a/ql-qlf-plugin/qlf_k6n10/dsp_map.v
+++ b/ql-qlf-plugin/qlf_k6n10/dsp_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module \$__MUL16X16 (input [15:0] A, input [15:0] B, output [31:0] Y);
 	parameter A_SIGNED = 0;
diff --git a/ql-qlf-plugin/qlf_k6n10/ffs_map.v b/ql-qlf-plugin/qlf_k6n10/ffs_map.v
index 500d21a..9182f37 100644
--- a/ql-qlf-plugin/qlf_k6n10/ffs_map.v
+++ b/ql-qlf-plugin/qlf_k6n10/ffs_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 // Basic DFF
 
diff --git a/ql-qlf-plugin/qlf_k6n10/lut_map.v b/ql-qlf-plugin/qlf_k6n10/lut_map.v
index 9687a90..9d24cba 100644
--- a/ql-qlf-plugin/qlf_k6n10/lut_map.v
+++ b/ql-qlf-plugin/qlf_k6n10/lut_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 `ifndef NO_LUT
 module \$lut (A, Y);
diff --git a/ql-qlf-plugin/qlf_k6n10f/TDP18Kx18_FIFO.v b/ql-qlf-plugin/qlf_k6n10f/TDP18Kx18_FIFO.v
index c9d0b8a..a68e88e 100644
--- a/ql-qlf-plugin/qlf_k6n10f/TDP18Kx18_FIFO.v
+++ b/ql-qlf-plugin/qlf_k6n10f/TDP18Kx18_FIFO.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module TDP18K_FIFO (
 	RMODE_A,
diff --git a/ql-qlf-plugin/qlf_k6n10f/arith_map.v b/ql-qlf-plugin/qlf_k6n10f/arith_map.v
index 35bd691..908b171 100644
--- a/ql-qlf-plugin/qlf_k6n10f/arith_map.v
+++ b/ql-qlf-plugin/qlf_k6n10f/arith_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 (* techmap_celltype = "$alu" *)
 module _80_quicklogic_alu (A, B, CI, BI, X, Y, CO);
 	parameter A_SIGNED = 0;
diff --git a/ql-qlf-plugin/qlf_k6n10f/brams_map.v b/ql-qlf-plugin/qlf_k6n10f/brams_map.v
index e1b7f27..4df5ec2 100644
--- a/ql-qlf-plugin/qlf_k6n10f/brams_map.v
+++ b/ql-qlf-plugin/qlf_k6n10f/brams_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 `define MODE_36 3'b111	// 36 or 32-bit
 `define MODE_18 3'b110	// 18 or 16-bit
diff --git a/ql-qlf-plugin/qlf_k6n10f/cells_sim.v b/ql-qlf-plugin/qlf_k6n10f/cells_sim.v
index f382797..dff4af3 100644
--- a/ql-qlf-plugin/qlf_k6n10f/cells_sim.v
+++ b/ql-qlf-plugin/qlf_k6n10f/cells_sim.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* abc9_flop, lib_whitebox *)
 module sh_dff(
diff --git a/ql-qlf-plugin/qlf_k6n10f/dsp_final_map.v b/ql-qlf-plugin/qlf_k6n10f/dsp_final_map.v
index 79c2f52..6967a44 100644
--- a/ql-qlf-plugin/qlf_k6n10f/dsp_final_map.v
+++ b/ql-qlf-plugin/qlf_k6n10f/dsp_final_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module dsp_t1_20x18x64 (
     input  [19:0] a_i,
diff --git a/ql-qlf-plugin/qlf_k6n10f/dsp_map.v b/ql-qlf-plugin/qlf_k6n10f/dsp_map.v
index 681d113..fbde7fd 100644
--- a/ql-qlf-plugin/qlf_k6n10f/dsp_map.v
+++ b/ql-qlf-plugin/qlf_k6n10f/dsp_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module \$__QL_MUL20X18 (input [19:0] A, input [17:0] B, output [37:0] Y);
     parameter A_SIGNED = 0;
diff --git a/ql-qlf-plugin/qlf_k6n10f/ffs_map.v b/ql-qlf-plugin/qlf_k6n10f/ffs_map.v
index 8e30585..273f28e 100644
--- a/ql-qlf-plugin/qlf_k6n10f/ffs_map.v
+++ b/ql-qlf-plugin/qlf_k6n10f/ffs_map.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 // Basic DFF
 
diff --git a/ql-qlf-plugin/qlf_k6n10f/sram1024x18.v b/ql-qlf-plugin/qlf_k6n10f/sram1024x18.v
index 88a571d..60cd586 100644
--- a/ql-qlf-plugin/qlf_k6n10f/sram1024x18.v
+++ b/ql-qlf-plugin/qlf_k6n10f/sram1024x18.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module sram1024x18 (
 	clk_a,
diff --git a/ql-qlf-plugin/qlf_k6n10f/ufifo_ctl.v b/ql-qlf-plugin/qlf_k6n10f/ufifo_ctl.v
index b1f7164..0c1dcc0 100644
--- a/ql-qlf-plugin/qlf_k6n10f/ufifo_ctl.v
+++ b/ql-qlf-plugin/qlf_k6n10f/ufifo_ctl.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module fifo_ctl (
 	raddr,
diff --git a/ql-qlf-plugin/quicklogic_eqn.cc b/ql-qlf-plugin/quicklogic_eqn.cc
index 4419432..b82a1b2 100644
--- a/ql-qlf-plugin/quicklogic_eqn.cc
+++ b/ql-qlf-plugin/quicklogic_eqn.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 
diff --git a/ql-qlf-plugin/synth_quicklogic.cc b/ql-qlf-plugin/synth_quicklogic.cc
index a44c9e4..acfeb24 100644
--- a/ql-qlf-plugin/synth_quicklogic.cc
+++ b/ql-qlf-plugin/synth_quicklogic.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 #include "kernel/celltypes.h"
diff --git a/ql-qlf-plugin/tests/Makefile b/ql-qlf-plugin/tests/Makefile
index 37654a5..ad507f6 100644
--- a/ql-qlf-plugin/tests/Makefile
+++ b/ql-qlf-plugin/tests/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 # The bram test will be enable in a future PR after it's been fixed.
 
diff --git a/ql-qlf-plugin/tests/consts/consts.v b/ql-qlf-plugin/tests/consts/consts.v
index 884e4c1..59e411c 100644
--- a/ql-qlf-plugin/tests/consts/consts.v
+++ b/ql-qlf-plugin/tests/consts/consts.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 (* keep_hierarchy *)
 module my_lut (
diff --git a/ql-qlf-plugin/tests/dffs/dffs.v b/ql-qlf-plugin/tests/dffs/dffs.v
index 60c1780..1963344 100644
--- a/ql-qlf-plugin/tests/dffs/dffs.v
+++ b/ql-qlf-plugin/tests/dffs/dffs.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module my_dff (
     input d,
diff --git a/ql-qlf-plugin/tests/fsm/fsm.v b/ql-qlf-plugin/tests/fsm/fsm.v
index 5b276aa..beea38a 100644
--- a/ql-qlf-plugin/tests/fsm/fsm.v
+++ b/ql-qlf-plugin/tests/fsm/fsm.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module fsm (
     clock,
diff --git a/ql-qlf-plugin/tests/full_adder/full_adder.v b/ql-qlf-plugin/tests/full_adder/full_adder.v
index 8bbbce7..dad4163 100644
--- a/ql-qlf-plugin/tests/full_adder/full_adder.v
+++ b/ql-qlf-plugin/tests/full_adder/full_adder.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module full_adder (
     input  wire [`WIDTH-1:0] A,
diff --git a/ql-qlf-plugin/tests/iob_no_flatten/iob_no_flatten.v b/ql-qlf-plugin/tests/iob_no_flatten/iob_no_flatten.v
index 47e85f7..2b64567 100644
--- a/ql-qlf-plugin/tests/iob_no_flatten/iob_no_flatten.v
+++ b/ql-qlf-plugin/tests/iob_no_flatten/iob_no_flatten.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module my_dff (
     input d,
diff --git a/ql-qlf-plugin/tests/latches/latches.v b/ql-qlf-plugin/tests/latches/latches.v
index 13b76d6..4d691b3 100644
--- a/ql-qlf-plugin/tests/latches/latches.v
+++ b/ql-qlf-plugin/tests/latches/latches.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module latchp (
     input d,
diff --git a/ql-qlf-plugin/tests/logic/logic.v b/ql-qlf-plugin/tests/logic/logic.v
index cc05402..cdf1fca 100644
--- a/ql-qlf-plugin/tests/logic/logic.v
+++ b/ql-qlf-plugin/tests/logic/logic.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input [0:7] in,
diff --git a/ql-qlf-plugin/tests/mac_unit/mac_unit.v b/ql-qlf-plugin/tests/mac_unit/mac_unit.v
index 6152c61..7644ef7 100644
--- a/ql-qlf-plugin/tests/mac_unit/mac_unit.v
+++ b/ql-qlf-plugin/tests/mac_unit/mac_unit.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module mac_unit (
     a,
diff --git a/ql-qlf-plugin/tests/multiplier/multiplier.v b/ql-qlf-plugin/tests/multiplier/multiplier.v
index 5523a0a..a552265 100644
--- a/ql-qlf-plugin/tests/multiplier/multiplier.v
+++ b/ql-qlf-plugin/tests/multiplier/multiplier.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module mult16x16 (
     a,
diff --git a/ql-qlf-plugin/tests/mux/mux.v b/ql-qlf-plugin/tests/mux/mux.v
index b18f65f..6ec90d1 100644
--- a/ql-qlf-plugin/tests/mux/mux.v
+++ b/ql-qlf-plugin/tests/mux/mux.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module mux2 (
     S,
diff --git a/ql-qlf-plugin/tests/pp3_bram/pp3_bram.v b/ql-qlf-plugin/tests/pp3_bram/pp3_bram.v
index 784f67d..9adf5cf 100644
--- a/ql-qlf-plugin/tests/pp3_bram/pp3_bram.v
+++ b/ql-qlf-plugin/tests/pp3_bram/pp3_bram.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module my_ram (
     CLK,
diff --git a/ql-qlf-plugin/tests/qlf_k6n10_bram/bram.v b/ql-qlf-plugin/tests/qlf_k6n10_bram/bram.v
index f19c3ce..f8b0587 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10_bram/bram.v
+++ b/ql-qlf-plugin/tests/qlf_k6n10_bram/bram.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module BRAM #(parameter AWIDTH = 9,
               parameter DWIDTH = 32)
diff --git a/ql-qlf-plugin/tests/qlf_k6n10f/bram_sdp/bram_sdp.v b/ql-qlf-plugin/tests/qlf_k6n10f/bram_sdp/bram_sdp.v
index 8ac8977..3670335 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10f/bram_sdp/bram_sdp.v
+++ b/ql-qlf-plugin/tests/qlf_k6n10f/bram_sdp/bram_sdp.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module BRAM_SDP #(parameter AWIDTH = 9,
 parameter DWIDTH = 32)(
diff --git a/ql-qlf-plugin/tests/qlf_k6n10f/bram_sdp/sim/Makefile b/ql-qlf-plugin/tests/qlf_k6n10f/bram_sdp/sim/Makefile
index 23c78ad..e0b9c16 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10f/bram_sdp/sim/Makefile
+++ b/ql-qlf-plugin/tests/qlf_k6n10f/bram_sdp/sim/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 TESTBENCH = bram_sdp_tb.v
 POST_SYNTH = bram_sdp_32x512_post_synth bram_sdp_16x1024_post_synth bram_sdp_8x2048_post_synth bram_sdp_4x4096_post_synth
diff --git a/ql-qlf-plugin/tests/qlf_k6n10f/bram_sdp/sim/bram_sdp_tb.v b/ql-qlf-plugin/tests/qlf_k6n10f/bram_sdp/sim/bram_sdp_tb.v
index 3641f1f..900ddc0 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10f/bram_sdp/sim/bram_sdp_tb.v
+++ b/ql-qlf-plugin/tests/qlf_k6n10f/bram_sdp/sim/bram_sdp_tb.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 `timescale 1ns/1ps
 
diff --git a/ql-qlf-plugin/tests/qlf_k6n10f/bram_tdp/bram_tdp.v b/ql-qlf-plugin/tests/qlf_k6n10f/bram_tdp/bram_tdp.v
index 96218f6..63e1efb 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10f/bram_tdp/bram_tdp.v
+++ b/ql-qlf-plugin/tests/qlf_k6n10f/bram_tdp/bram_tdp.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module BRAM_TDP #(parameter AWIDTH = 9,
 parameter DWIDTH = 32)(
diff --git a/ql-qlf-plugin/tests/qlf_k6n10f/bram_tdp/sim/Makefile b/ql-qlf-plugin/tests/qlf_k6n10f/bram_tdp/sim/Makefile
index 48de42d..daa8326 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10f/bram_tdp/sim/Makefile
+++ b/ql-qlf-plugin/tests/qlf_k6n10f/bram_tdp/sim/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 TESTBENCH = bram_tdp_tb.v
 POST_SYNTH = bram_tdp_32x512_post_synth bram_tdp_16x1024_post_synth bram_tdp_8x2048_post_synth bram_tdp_4x4096_post_synth
diff --git a/ql-qlf-plugin/tests/qlf_k6n10f/bram_tdp/sim/bram_tdp_tb.v b/ql-qlf-plugin/tests/qlf_k6n10f/bram_tdp/sim/bram_tdp_tb.v
index 77b3f46..c729462 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10f/bram_tdp/sim/bram_tdp_tb.v
+++ b/ql-qlf-plugin/tests/qlf_k6n10f/bram_tdp/sim/bram_tdp_tb.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 `timescale 1ns/1ps
 
diff --git a/ql-qlf-plugin/tests/qlf_k6n10f/dsp_macc/dsp_macc.v b/ql-qlf-plugin/tests/qlf_k6n10f/dsp_macc/dsp_macc.v
index 6933e90..dd9549a 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10f/dsp_macc/dsp_macc.v
+++ b/ql-qlf-plugin/tests/qlf_k6n10f/dsp_macc/dsp_macc.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module macc_simple (
     input  wire        clk,
diff --git a/ql-qlf-plugin/tests/qlf_k6n10f/dsp_mult/dsp_mult.v b/ql-qlf-plugin/tests/qlf_k6n10f/dsp_mult/dsp_mult.v
index f8b25e6..1318c3b 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10f/dsp_mult/dsp_mult.v
+++ b/ql-qlf-plugin/tests/qlf_k6n10f/dsp_mult/dsp_mult.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module mult_16x16 (
     input  wire [15:0] A,
diff --git a/ql-qlf-plugin/tests/qlf_k6n10f/dsp_simd/dsp_simd.v b/ql-qlf-plugin/tests/qlf_k6n10f/dsp_simd/dsp_simd.v
index 08cd994..b684903 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10f/dsp_simd/dsp_simd.v
+++ b/ql-qlf-plugin/tests/qlf_k6n10f/dsp_simd/dsp_simd.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module simd_mult (
     input  wire         clk,
diff --git a/ql-qlf-plugin/tests/qlf_k6n10f/sim_dsp_fir/sim_dsp_fir.v b/ql-qlf-plugin/tests/qlf_k6n10f/sim_dsp_fir/sim_dsp_fir.v
index 5565ddb..cf32147 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10f/sim_dsp_fir/sim_dsp_fir.v
+++ b/ql-qlf-plugin/tests/qlf_k6n10f/sim_dsp_fir/sim_dsp_fir.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 `include "qlf_k6n10f/cells_sim.v"
 
diff --git a/ql-qlf-plugin/tests/qlf_k6n10f/sim_dsp_mult/sim_dsp_mult.v b/ql-qlf-plugin/tests/qlf_k6n10f/sim_dsp_mult/sim_dsp_mult.v
index 22ba57d..55784b9 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10f/sim_dsp_mult/sim_dsp_mult.v
+++ b/ql-qlf-plugin/tests/qlf_k6n10f/sim_dsp_mult/sim_dsp_mult.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 `include "qlf_k6n10f/cells_sim.v"
 `timescale 1ns/1ps
diff --git a/ql-qlf-plugin/tests/qlf_k6n10f/sim_dsp_mult_r/sim_dsp_mult_r.v b/ql-qlf-plugin/tests/qlf_k6n10f/sim_dsp_mult_r/sim_dsp_mult_r.v
index eae3589..cdd0a66 100644
--- a/ql-qlf-plugin/tests/qlf_k6n10f/sim_dsp_mult_r/sim_dsp_mult_r.v
+++ b/ql-qlf-plugin/tests/qlf_k6n10f/sim_dsp_mult_r/sim_dsp_mult_r.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 `include "qlf_k6n10f/cells_sim.v"
 
diff --git a/ql-qlf-plugin/tests/shreg/shreg.v b/ql-qlf-plugin/tests/shreg/shreg.v
index ff1712f..7e8f471 100644
--- a/ql-qlf-plugin/tests/shreg/shreg.v
+++ b/ql-qlf-plugin/tests/shreg/shreg.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input  wire I,
diff --git a/ql-qlf-plugin/tests/tribuf/tribuf.v b/ql-qlf-plugin/tests/tribuf/tribuf.v
index 95a9f8e..b94b103 100644
--- a/ql-qlf-plugin/tests/tribuf/tribuf.v
+++ b/ql-qlf-plugin/tests/tribuf/tribuf.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module tristate (
     en,
diff --git a/sdc-plugin/Makefile b/sdc-plugin/Makefile
index f25e578..3ae63e0 100644
--- a/sdc-plugin/Makefile
+++ b/sdc-plugin/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 NAME = sdc
 SOURCES = buffers.cc \
diff --git a/sdc-plugin/buffers.cc b/sdc-plugin/buffers.cc
index 493d98c..9c2308a 100644
--- a/sdc-plugin/buffers.cc
+++ b/sdc-plugin/buffers.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #include "buffers.h"
 #include <cassert>
diff --git a/sdc-plugin/buffers.h b/sdc-plugin/buffers.h
index ab894af..1665b4d 100644
--- a/sdc-plugin/buffers.h
+++ b/sdc-plugin/buffers.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #ifndef _BUFFERS_H_
 #define _BUFFERS_H_
diff --git a/sdc-plugin/clocks.cc b/sdc-plugin/clocks.cc
index 6cbabbb..a1c4a7a 100644
--- a/sdc-plugin/clocks.cc
+++ b/sdc-plugin/clocks.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #include "clocks.h"
 #include "kernel/register.h"
diff --git a/sdc-plugin/clocks.h b/sdc-plugin/clocks.h
index 0aa0caa..47fc5df 100644
--- a/sdc-plugin/clocks.h
+++ b/sdc-plugin/clocks.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #ifndef _CLOCKS_H_
 #define _CLOCKS_H_
diff --git a/sdc-plugin/propagation.cc b/sdc-plugin/propagation.cc
index 00958f5..dd7718e 100644
--- a/sdc-plugin/propagation.cc
+++ b/sdc-plugin/propagation.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #include "propagation.h"
 #include <cassert>
diff --git a/sdc-plugin/propagation.h b/sdc-plugin/propagation.h
index 8be770f..cb47cd0 100644
--- a/sdc-plugin/propagation.h
+++ b/sdc-plugin/propagation.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #ifndef _PROPAGATION_H_
 #define _PROPAGATION_H_
diff --git a/sdc-plugin/sdc.cc b/sdc-plugin/sdc.cc
index 317bbca..9560141 100644
--- a/sdc-plugin/sdc.cc
+++ b/sdc-plugin/sdc.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #include <algorithm>
 #include <array>
diff --git a/sdc-plugin/sdc_writer.cc b/sdc-plugin/sdc_writer.cc
index af67197..22157ca 100644
--- a/sdc-plugin/sdc_writer.cc
+++ b/sdc-plugin/sdc_writer.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #include "sdc_writer.h"
 
diff --git a/sdc-plugin/sdc_writer.h b/sdc-plugin/sdc_writer.h
index 7f21ad7..354881e 100644
--- a/sdc-plugin/sdc_writer.h
+++ b/sdc-plugin/sdc_writer.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #ifndef _SDC_WRITER_H_
 #define _SDC_WRITER_H_
diff --git a/sdc-plugin/set_clock_groups.cc b/sdc-plugin/set_clock_groups.cc
index 0b7b952..3a64c31 100644
--- a/sdc-plugin/set_clock_groups.cc
+++ b/sdc-plugin/set_clock_groups.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #include "set_clock_groups.h"
 #include "kernel/log.h"
diff --git a/sdc-plugin/set_clock_groups.h b/sdc-plugin/set_clock_groups.h
index 4d41767..22d9003 100644
--- a/sdc-plugin/set_clock_groups.h
+++ b/sdc-plugin/set_clock_groups.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #ifndef _SET_CLOCK_GROUPS_H_
 #define _SET_CLOCK_GROUPS_H_
diff --git a/sdc-plugin/set_false_path.cc b/sdc-plugin/set_false_path.cc
index 31dc61c..112a284 100644
--- a/sdc-plugin/set_false_path.cc
+++ b/sdc-plugin/set_false_path.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #include "set_false_path.h"
 #include "kernel/log.h"
diff --git a/sdc-plugin/set_false_path.h b/sdc-plugin/set_false_path.h
index 2003f82..a779aa4 100644
--- a/sdc-plugin/set_false_path.h
+++ b/sdc-plugin/set_false_path.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #ifndef _SET_FALSE_PATH_H_
 #define _SET_FALSE_PATH_H_
diff --git a/sdc-plugin/set_max_delay.cc b/sdc-plugin/set_max_delay.cc
index 19384ef..4bf2754 100644
--- a/sdc-plugin/set_max_delay.cc
+++ b/sdc-plugin/set_max_delay.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #include "set_max_delay.h"
 #include "kernel/log.h"
diff --git a/sdc-plugin/set_max_delay.h b/sdc-plugin/set_max_delay.h
index 7db8459..6f3e50d 100644
--- a/sdc-plugin/set_max_delay.h
+++ b/sdc-plugin/set_max_delay.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #ifndef _SET_MAX_DELAY_H_
 #define _SET_MAX_DELAY_H_
diff --git a/sdc-plugin/tests/Makefile b/sdc-plugin/tests/Makefile
index 3fad798..06f0c73 100644
--- a/sdc-plugin/tests/Makefile
+++ b/sdc-plugin/tests/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 # abc9 - test that abc9.D is correctly set after importing a clock.
 # counter, counter2, pll - test buffer and clock divider propagation
diff --git a/sdc-plugin/tests/abc9/abc9.v b/sdc-plugin/tests/abc9/abc9.v
index 9b6f9e0..a2038ab 100644
--- a/sdc-plugin/tests/abc9/abc9.v
+++ b/sdc-plugin/tests/abc9/abc9.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input  clk1,
diff --git a/sdc-plugin/tests/counter/counter.v b/sdc-plugin/tests/counter/counter.v
index 0ca84bb..acda4b6 100644
--- a/sdc-plugin/tests/counter/counter.v
+++ b/sdc-plugin/tests/counter/counter.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/sdc-plugin/tests/counter2/counter2.v b/sdc-plugin/tests/counter2/counter2.v
index 0ca84bb..acda4b6 100644
--- a/sdc-plugin/tests/counter2/counter2.v
+++ b/sdc-plugin/tests/counter2/counter2.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/sdc-plugin/tests/create_clock_add/create_clock_add.v b/sdc-plugin/tests/create_clock_add/create_clock_add.v
index 0ca84bb..acda4b6 100644
--- a/sdc-plugin/tests/create_clock_add/create_clock_add.v
+++ b/sdc-plugin/tests/create_clock_add/create_clock_add.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/sdc-plugin/tests/get_clocks/get_clocks.v b/sdc-plugin/tests/get_clocks/get_clocks.v
index 59dd17e..4f92117 100644
--- a/sdc-plugin/tests/get_clocks/get_clocks.v
+++ b/sdc-plugin/tests/get_clocks/get_clocks.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/sdc-plugin/tests/period_check/period_check.v b/sdc-plugin/tests/period_check/period_check.v
index d49af36..64f4af5 100644
--- a/sdc-plugin/tests/period_check/period_check.v
+++ b/sdc-plugin/tests/period_check/period_check.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     (* CLOCK_SIGNAL = "yes", WAVEFORM = "0 5" *)
diff --git a/sdc-plugin/tests/period_format_check/period_format_check.v b/sdc-plugin/tests/period_format_check/period_format_check.v
index cce3442..5ed26b7 100644
--- a/sdc-plugin/tests/period_format_check/period_format_check.v
+++ b/sdc-plugin/tests/period_format_check/period_format_check.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     (* CLOCK_SIGNAL = "yes", PERIOD = "bad value", WAVEFORM = "0 5" *)
diff --git a/sdc-plugin/tests/pll/pll.v b/sdc-plugin/tests/pll/pll.v
index 9410ffd..41e38a2 100644
--- a/sdc-plugin/tests/pll/pll.v
+++ b/sdc-plugin/tests/pll/pll.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/sdc-plugin/tests/pll_approx_equal/pll_approx_equal.v b/sdc-plugin/tests/pll_approx_equal/pll_approx_equal.v
index 2c622af..1befb82 100644
--- a/sdc-plugin/tests/pll_approx_equal/pll_approx_equal.v
+++ b/sdc-plugin/tests/pll_approx_equal/pll_approx_equal.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/sdc-plugin/tests/pll_dangling_wires/pll_dangling_wires.v b/sdc-plugin/tests/pll_dangling_wires/pll_dangling_wires.v
index ccd4819..4db1d89 100644
--- a/sdc-plugin/tests/pll_dangling_wires/pll_dangling_wires.v
+++ b/sdc-plugin/tests/pll_dangling_wires/pll_dangling_wires.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input  clk,
diff --git a/sdc-plugin/tests/pll_div/pll_div.v b/sdc-plugin/tests/pll_div/pll_div.v
index 2e50345..00e83a1 100644
--- a/sdc-plugin/tests/pll_div/pll_div.v
+++ b/sdc-plugin/tests/pll_div/pll_div.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/sdc-plugin/tests/pll_fbout_phase/pll_fbout_phase.v b/sdc-plugin/tests/pll_fbout_phase/pll_fbout_phase.v
index 5013d44..036b1a8 100644
--- a/sdc-plugin/tests/pll_fbout_phase/pll_fbout_phase.v
+++ b/sdc-plugin/tests/pll_fbout_phase/pll_fbout_phase.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/sdc-plugin/tests/pll_propagated/pll_propagated.v b/sdc-plugin/tests/pll_propagated/pll_propagated.v
index 9410ffd..41e38a2 100644
--- a/sdc-plugin/tests/pll_propagated/pll_propagated.v
+++ b/sdc-plugin/tests/pll_propagated/pll_propagated.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/sdc-plugin/tests/restore_from_json/restore_from_json.v b/sdc-plugin/tests/restore_from_json/restore_from_json.v
index e0aec1c..0ba4dea 100644
--- a/sdc-plugin/tests/restore_from_json/restore_from_json.v
+++ b/sdc-plugin/tests/restore_from_json/restore_from_json.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input  clk,
diff --git a/sdc-plugin/tests/set_clock_groups/set_clock_groups.v b/sdc-plugin/tests/set_clock_groups/set_clock_groups.v
index afc56d8..d8a6411 100644
--- a/sdc-plugin/tests/set_clock_groups/set_clock_groups.v
+++ b/sdc-plugin/tests/set_clock_groups/set_clock_groups.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     (* async_reg = "true", mr_ff = "true", dont_touch = "true" *) input clk,
diff --git a/sdc-plugin/tests/set_false_path/set_false_path.v b/sdc-plugin/tests/set_false_path/set_false_path.v
index afc56d8..d8a6411 100644
--- a/sdc-plugin/tests/set_false_path/set_false_path.v
+++ b/sdc-plugin/tests/set_false_path/set_false_path.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     (* async_reg = "true", mr_ff = "true", dont_touch = "true" *) input clk,
diff --git a/sdc-plugin/tests/set_max_delay/set_max_delay.v b/sdc-plugin/tests/set_max_delay/set_max_delay.v
index afc56d8..d8a6411 100644
--- a/sdc-plugin/tests/set_max_delay/set_max_delay.v
+++ b/sdc-plugin/tests/set_max_delay/set_max_delay.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     (* async_reg = "true", mr_ff = "true", dont_touch = "true" *) input clk,
diff --git a/sdc-plugin/tests/waveform_check/waveform_check.v b/sdc-plugin/tests/waveform_check/waveform_check.v
index 9812dad..c647225 100644
--- a/sdc-plugin/tests/waveform_check/waveform_check.v
+++ b/sdc-plugin/tests/waveform_check/waveform_check.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     (* CLOCK_SIGNAL = "yes", PERIOD = "10", WAVEFORM = "bad value" *)
diff --git a/systemverilog-plugin/Makefile b/systemverilog-plugin/Makefile
index d63cee4..b984207 100644
--- a/systemverilog-plugin/Makefile
+++ b/systemverilog-plugin/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 NAME = systemverilog
 SOURCES = UhdmAst.cc \
diff --git a/systemverilog-plugin/tests/Makefile b/systemverilog-plugin/tests/Makefile
index 76892a2..1c6f1d8 100644
--- a/systemverilog-plugin/tests/Makefile
+++ b/systemverilog-plugin/tests/Makefile
@@ -1,9 +1,17 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 include $(shell pwd)/../../Makefile_test.common
diff --git a/systemverilog-plugin/uhdmastfrontend.cc b/systemverilog-plugin/uhdmastfrontend.cc
index a84410b..ae7f319 100644
--- a/systemverilog-plugin/uhdmastfrontend.cc
+++ b/systemverilog-plugin/uhdmastfrontend.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 
diff --git a/systemverilog-plugin/uhdmcommonfrontend.cc b/systemverilog-plugin/uhdmcommonfrontend.cc
index a88101e..fe7433d 100644
--- a/systemverilog-plugin/uhdmcommonfrontend.cc
+++ b/systemverilog-plugin/uhdmcommonfrontend.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 
diff --git a/systemverilog-plugin/uhdmcommonfrontend.h b/systemverilog-plugin/uhdmcommonfrontend.h
index 616ff4b..6fcb0f9 100644
--- a/systemverilog-plugin/uhdmcommonfrontend.h
+++ b/systemverilog-plugin/uhdmcommonfrontend.h
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 
diff --git a/systemverilog-plugin/uhdmsurelogastfrontend.cc b/systemverilog-plugin/uhdmsurelogastfrontend.cc
index 1768ff3..2f2a89f 100644
--- a/systemverilog-plugin/uhdmsurelogastfrontend.cc
+++ b/systemverilog-plugin/uhdmsurelogastfrontend.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  */
 
diff --git a/uhdm-plugin/Makefile b/uhdm-plugin/Makefile
index 3386320..3eea3d4 100644
--- a/uhdm-plugin/Makefile
+++ b/uhdm-plugin/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 NAME = uhdm
 SOURCES = uhdm.cc
diff --git a/uhdm-plugin/tests/Makefile b/uhdm-plugin/tests/Makefile
index 76892a2..1c6f1d8 100644
--- a/uhdm-plugin/tests/Makefile
+++ b/uhdm-plugin/tests/Makefile
@@ -1,9 +1,17 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 include $(shell pwd)/../../Makefile_test.common
diff --git a/uhdm-plugin/uhdm.cc b/uhdm-plugin/uhdm.cc
index 596f0b7..9fde149 100644
--- a/uhdm-plugin/uhdm.cc
+++ b/uhdm-plugin/uhdm.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  */
 #include "kernel/log.h"
 
diff --git a/xdc-plugin/BANK.v b/xdc-plugin/BANK.v
index 206fcb3..dea2a5e 100644
--- a/xdc-plugin/BANK.v
+++ b/xdc-plugin/BANK.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module BANK();
 	parameter FASM_EXTRA = "INTERNAL_VREF";
diff --git a/xdc-plugin/Makefile b/xdc-plugin/Makefile
index b42a87b..06d61d7 100644
--- a/xdc-plugin/Makefile
+++ b/xdc-plugin/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 NAME = xdc
 SOURCES = xdc.cc
diff --git a/xdc-plugin/tests/Makefile b/xdc-plugin/tests/Makefile
index a198daf..ce5ac8c 100644
--- a/xdc-plugin/tests/Makefile
+++ b/xdc-plugin/tests/Makefile
@@ -1,10 +1,18 @@
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 # counter - basic test for IOSTANDARD, SLEW, DRIVE, IN_TERM properties
 # counter-dict - basic test using XDC -dict for IOSTANDARD, SLEW, DRIVE, IN_TERM properties
diff --git a/xdc-plugin/tests/compare_output_json.py b/xdc-plugin/tests/compare_output_json.py
index 0846996..d0440aa 100644
--- a/xdc-plugin/tests/compare_output_json.py
+++ b/xdc-plugin/tests/compare_output_json.py
@@ -1,13 +1,21 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2019-2022 The SymbiFlow Authors
+# Copyright 2020-2022 F4PGA Authors
 #
-# Use of this source code is governed by a ISC-style
-# license that can be found in the LICENSE file or at
-# https://opensource.org/licenses/ISC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# SPDX-License-Identifier: ISC
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 """
 
diff --git a/xdc-plugin/tests/counter-dict/counter-dict.v b/xdc-plugin/tests/counter-dict/counter-dict.v
index 54c4380..cc8a821 100644
--- a/xdc-plugin/tests/counter-dict/counter-dict.v
+++ b/xdc-plugin/tests/counter-dict/counter-dict.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/xdc-plugin/tests/counter/counter.v b/xdc-plugin/tests/counter/counter.v
index 54c4380..cc8a821 100644
--- a/xdc-plugin/tests/counter/counter.v
+++ b/xdc-plugin/tests/counter/counter.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/xdc-plugin/tests/io_loc_pairs/cells_xtra.v b/xdc-plugin/tests/io_loc_pairs/cells_xtra.v
index c6fef30..37a334c 100644
--- a/xdc-plugin/tests/io_loc_pairs/cells_xtra.v
+++ b/xdc-plugin/tests/io_loc_pairs/cells_xtra.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module GTPE2_CHANNEL (
     (* iopad_external_pin *)
diff --git a/xdc-plugin/tests/io_loc_pairs/io_loc_pairs.v b/xdc-plugin/tests/io_loc_pairs/io_loc_pairs.v
index 74581de..bb08dee 100644
--- a/xdc-plugin/tests/io_loc_pairs/io_loc_pairs.v
+++ b/xdc-plugin/tests/io_loc_pairs/io_loc_pairs.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/xdc-plugin/tests/non_zero_port_indexes/non_zero_port_indexes.v b/xdc-plugin/tests/non_zero_port_indexes/non_zero_port_indexes.v
index 24c66c6..f4a4093 100644
--- a/xdc-plugin/tests/non_zero_port_indexes/non_zero_port_indexes.v
+++ b/xdc-plugin/tests/non_zero_port_indexes/non_zero_port_indexes.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top(
            output [5:2] LED
diff --git a/xdc-plugin/tests/package_pins-dict-space/package_pins-dict-space.v b/xdc-plugin/tests/package_pins-dict-space/package_pins-dict-space.v
index 4f419e7..23336ed 100644
--- a/xdc-plugin/tests/package_pins-dict-space/package_pins-dict-space.v
+++ b/xdc-plugin/tests/package_pins-dict-space/package_pins-dict-space.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/xdc-plugin/tests/package_pins/package_pins.v b/xdc-plugin/tests/package_pins/package_pins.v
index 4f419e7..23336ed 100644
--- a/xdc-plugin/tests/package_pins/package_pins.v
+++ b/xdc-plugin/tests/package_pins/package_pins.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/xdc-plugin/tests/port_indexes/port_indexes.v b/xdc-plugin/tests/port_indexes/port_indexes.v
index 54c4380..cc8a821 100644
--- a/xdc-plugin/tests/port_indexes/port_indexes.v
+++ b/xdc-plugin/tests/port_indexes/port_indexes.v
@@ -1,10 +1,18 @@
-// Copyright (C) 2019-2022 The SymbiFlow Authors
+// Copyright 2020-2022 F4PGA Authors
 //
-// Use of this source code is governed by a ISC-style
-// license that can be found in the LICENSE file or at
-// https://opensource.org/licenses/ISC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
 //
-// SPDX-License-Identifier: ISC
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 module top (
     input clk,
diff --git a/xdc-plugin/xdc.cc b/xdc-plugin/xdc.cc
index 65756a5..9a66029 100644
--- a/xdc-plugin/xdc.cc
+++ b/xdc-plugin/xdc.cc
@@ -1,11 +1,19 @@
 /*
- * Copyright (C) 2019-2022 The SymbiFlow Authors
+ * Copyright 2020-2022 F4PGA Authors
  *
- * Use of this source code is governed by a ISC-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/ISC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * SPDX-License-Identifier: ISC
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  *  ---
  *