diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..3d1d5c5
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,12 @@
+# This is the list of vtr-xml-utils' significant contributors.
+#
+# This does not necessarily list everyone who has contributed code,
+# especially since many employees of one corporation may be contributing.
+# To see the full list of contributors, see the revision history in
+# source control.
+Antmicro
+Google LLC
+
+Jeppe Johansen
+Fahrican Koşar
+Jeffrey Elms
diff --git a/COPYING b/LICENSE
similarity index 90%
rename from COPYING
rename to LICENSE
index dec4d93..d672eaf 100644
--- a/COPYING
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (C) 2019  SymbiFlow Project Authors. All rights reserved.
+Copyright (C) 2020  SymbiFlow Project Authors.
 
 Permission to use, copy, modify, and/or distribute this software for any
 purpose with or without fee is hereby granted, provided that the above
diff --git a/MANIFEST.in b/MANIFEST.in
index db00b77..ec69bb1 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -5,7 +5,9 @@
 include *.md
 
 # Include the license file
-include COPYING
+include LICENSE
+# Include the AUTHORS file
+include AUTHORS
 
 include *.txt
 
diff --git a/setup.py b/setup.py
index da4df12..c74a010 100644
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,14 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2020  The SymbiFlow 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
+#
+# SPDX-License-Identifier:  ISC
+
 import setuptools
 
 with open("README.md", "r") as fh:
diff --git a/tests/test_converting.py b/tests/test_converting.py
index d6f4e81..37d9a1f 100644
--- a/tests/test_converting.py
+++ b/tests/test_converting.py
@@ -1,4 +1,13 @@
 #!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2020  The SymbiFlow 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
+#
+# SPDX-License-Identifier:  ISC
 
 import pytest
 from vtr_xml_utils import convert
diff --git a/vtr_xml_utils/__main__.py b/vtr_xml_utils/__main__.py
index 7204119..dce03a5 100644
--- a/vtr_xml_utils/__main__.py
+++ b/vtr_xml_utils/__main__.py
@@ -1,4 +1,13 @@
 #!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2020  The SymbiFlow 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
+#
+# SPDX-License-Identifier:  ISC
 
 from . import convert
 
diff --git a/vtr_xml_utils/convert.py b/vtr_xml_utils/convert.py
index d751651..73e5fb8 100644
--- a/vtr_xml_utils/convert.py
+++ b/vtr_xml_utils/convert.py
@@ -1,4 +1,14 @@
 #!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2020  The SymbiFlow 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
+#
+# SPDX-License-Identifier:  ISC
+
 import lxml.etree as ET
 import pkg_resources
 import os
diff --git a/vtr_xml_utils/resources/attribute-fixes.xsl b/vtr_xml_utils/resources/attribute-fixes.xsl
index ed4d65b..ed10b16 100644
--- a/vtr_xml_utils/resources/attribute-fixes.xsl
+++ b/vtr_xml_utils/resources/attribute-fixes.xsl
@@ -1,4 +1,13 @@
 <?xml version="1.0"?>
+<!-- 
+ Copyright (C) 2020  The SymbiFlow 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
+
+ SPDX-License-Identifier:   ISC
+-->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
 
   <xsl:include href="identity.xsl" />
diff --git a/vtr_xml_utils/resources/convert-pb_type-attributes.xsl b/vtr_xml_utils/resources/convert-pb_type-attributes.xsl
index 0cc4af7..2482afe 100644
--- a/vtr_xml_utils/resources/convert-pb_type-attributes.xsl
+++ b/vtr_xml_utils/resources/convert-pb_type-attributes.xsl
@@ -1,4 +1,13 @@
 <?xml version="1.0"?>
+<!-- 
+ Copyright (C) 2020  The SymbiFlow 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
+
+ SPDX-License-Identifier:   ISC
+-->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
 
   <xsl:include href="identity.xsl" />
diff --git a/vtr_xml_utils/resources/convert-port-tag.xsl b/vtr_xml_utils/resources/convert-port-tag.xsl
index 7ee6dc3..c9c8e01 100644
--- a/vtr_xml_utils/resources/convert-port-tag.xsl
+++ b/vtr_xml_utils/resources/convert-port-tag.xsl
@@ -1,4 +1,13 @@
 <?xml version="1.0"?>
+<!-- 
+ Copyright (C) 2020  The SymbiFlow 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
+
+ SPDX-License-Identifier:   ISC
+-->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
 
   <xsl:include href="identity.xsl" />
diff --git a/vtr_xml_utils/resources/convert-prefix-port.xsl b/vtr_xml_utils/resources/convert-prefix-port.xsl
index c7f8867..76a9c9e 100644
--- a/vtr_xml_utils/resources/convert-prefix-port.xsl
+++ b/vtr_xml_utils/resources/convert-prefix-port.xsl
@@ -1,4 +1,13 @@
 <?xml version="1.0"?>
+<!-- 
+ Copyright (C) 2020  The SymbiFlow 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
+
+ SPDX-License-Identifier:   ISC
+-->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
 
   <xsl:include href="identity.xsl" />
diff --git a/vtr_xml_utils/resources/fpga_architecture.xsd b/vtr_xml_utils/resources/fpga_architecture.xsd
index 2236a3f..efd964a 100644
--- a/vtr_xml_utils/resources/fpga_architecture.xsd
+++ b/vtr_xml_utils/resources/fpga_architecture.xsd
@@ -1,9 +1,16 @@
 <?xml version="1.0"?>
-<!--
-  Copyright 2018 Jeppe Johansen
+<!-- 
+ Copyright (C) 2020  The SymbiFlow Authors.
 
-  XML 1.0 Schema for the FPGA architecture description structure developed based on documentation here:
-  http://vtr-verilog-to-routing.readthedocs.io/en/latest/arch/index.html
+ 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
+
+ SPDX-License-Identifier:   ISC
+
+
+ XML 1.0 Schema for the FPGA architecture description structure developed based on documentation here:
+ http://vtr-verilog-to-routing.readthedocs.io/en/latest/arch/index.html
 -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
 
diff --git a/vtr_xml_utils/resources/identity.xsl b/vtr_xml_utils/resources/identity.xsl
index 23ff094..67de266 100644
--- a/vtr_xml_utils/resources/identity.xsl
+++ b/vtr_xml_utils/resources/identity.xsl
@@ -1,3 +1,13 @@
+<?xml version="1.0"?>
+<!-- 
+ Copyright (C) 2020  The SymbiFlow 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
+
+ SPDX-License-Identifier:   ISC
+-->
 <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
   <xsl:output method="xml" indent="yes"/>
   <xsl:strip-space elements="*"/>
diff --git a/vtr_xml_utils/resources/pack-patterns.xsl b/vtr_xml_utils/resources/pack-patterns.xsl
index 0203b5c..eb07d79 100644
--- a/vtr_xml_utils/resources/pack-patterns.xsl
+++ b/vtr_xml_utils/resources/pack-patterns.xsl
@@ -1,4 +1,13 @@
 <?xml version="1.0"?>
+<!-- 
+ Copyright (C) 2020  The SymbiFlow 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
+
+ SPDX-License-Identifier:   ISC
+-->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
 
   <xsl:include href="identity.xsl" />
diff --git a/vtr_xml_utils/resources/packed_netlist.xsd b/vtr_xml_utils/resources/packed_netlist.xsd
index 90631af..355f7b7 100644
--- a/vtr_xml_utils/resources/packed_netlist.xsd
+++ b/vtr_xml_utils/resources/packed_netlist.xsd
@@ -1,9 +1,16 @@
 <?xml version="1.0"?>
-<!--
-  Copyright 2018 Jeppe Johansen
+<!-- 
+ Copyright (C) 2020  The SymbiFlow Authors.
 
-  XML 1.0 Schema for packed netlist format developed based on documentation here:
-  http://vtr-verilog-to-routing.readthedocs.io/en/latest/vpr/file_formats.html#packed-netlist-format-net
+ 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
+
+ SPDX-License-Identifier:   ISC
+
+
+ XML 1.0 Schema for packed netlist format developed based on documentation here:
+ http://vtr-verilog-to-routing.readthedocs.io/en/latest/vpr/file_formats.html#packed-netlist-format-net
 -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
 
diff --git a/vtr_xml_utils/resources/remove-duplicate-models.xsl b/vtr_xml_utils/resources/remove-duplicate-models.xsl
index 7c4c532..07f65d7 100644
--- a/vtr_xml_utils/resources/remove-duplicate-models.xsl
+++ b/vtr_xml_utils/resources/remove-duplicate-models.xsl
@@ -1,4 +1,13 @@
 <?xml version="1.0"?>
+<!-- 
+ Copyright (C) 2020  The SymbiFlow 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
+
+ SPDX-License-Identifier:   ISC
+-->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
 
   <xsl:include href="identity.xsl" />
diff --git a/vtr_xml_utils/resources/routing_resource.xsd b/vtr_xml_utils/resources/routing_resource.xsd
index f890844..555e1f7 100644
--- a/vtr_xml_utils/resources/routing_resource.xsd
+++ b/vtr_xml_utils/resources/routing_resource.xsd
@@ -1,9 +1,16 @@
 <?xml version="1.0"?>
-<!--
-  Copyright 2018 Jeppe Johansen
+<!-- 
+ Copyright (C) 2020  The SymbiFlow Authors.
 
-  XML 1.0 Schema for rr_graph structure developed based on documentation here:
-  http://vtr-verilog-to-routing.readthedocs.io/en/latest/vpr/file_formats.html#routing-resource-graph-file-format-xml
+ 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
+
+ SPDX-License-Identifier:   ISC
+
+
+ XML 1.0 Schema for rr_graph structure developed based on documentation here:
+ http://vtr-verilog-to-routing.readthedocs.io/en/latest/vpr/file_formats.html#routing-resource-graph-file-format-xml
 -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
 
diff --git a/vtr_xml_utils/resources/sort-tags.xsl b/vtr_xml_utils/resources/sort-tags.xsl
index 76eb5a3..6f60b69 100644
--- a/vtr_xml_utils/resources/sort-tags.xsl
+++ b/vtr_xml_utils/resources/sort-tags.xsl
@@ -1,3 +1,13 @@
+<?xml version="1.0"?>
+<!-- 
+ Copyright (C) 2020  The SymbiFlow 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
+
+ SPDX-License-Identifier:   ISC
+-->
 <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 
  <xsl:include href="identity.xsl" />