diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 610dd92..197c404 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -21,59 +21,6 @@
 follow the open source best practice of using the [Contributor
 Covenant](https://www.contributor-covenant.org/) for our Code of Conduct.
 
-### Sign your work
-
-To improve tracking of who did what, we follow the Linux Kernel's
-["sign your work" system](https://github.com/wking/signed-off-by).
-This is also called a
-["DCO" or "Developer's Certificate of Origin"](https://developercertificate.org/).
-
-**All** commits are required to include this sign off and we use the
-[Probot DCO App](https://github.com/probot/dco) to check pull requests for
-this.
-
-The sign-off is a simple line at the end of the explanation for the
-patch, which certifies that you wrote it or otherwise have the right to
-pass it on as a open-source patch.  The rules are pretty simple: if you
-can certify the below:
-
-        Developer's Certificate of Origin 1.1
-
-        By making a contribution to this project, I certify that:
-
-        (a) The contribution was created in whole or in part by me and I
-            have the right to submit it under the open source license
-            indicated in the file; or
-
-        (b) The contribution is based upon previous work that, to the best
-            of my knowledge, is covered under an appropriate open source
-            license and I have the right under that license to submit that
-            work with modifications, whether created in whole or in part
-            by me, under the same open source license (unless I am
-            permitted to submit under a different license), as indicated
-            in the file; or
-
-        (c) The contribution was provided directly to me by some other
-            person who certified (a), (b) or (c) and I have not modified
-            it.
-
-	(d) I understand and agree that this project and the contribution
-	    are public and that a record of the contribution (including all
-	    personal information I submit with it, including my sign-off) is
-	    maintained indefinitely and may be redistributed consistent with
-	    this project or the open source license(s) involved.
-
-then you just add a line saying
-
-	Signed-off-by: Random J Developer <random@developer.example.org>
-
-using your real name (sorry, no pseudonyms or anonymous contributions.)
-
-
-
-
-
-
 ----
 
 This file is generated from [README.md](README.md), please edit that file then
diff --git a/README.md b/README.md
index a3c7c62..cce4822 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@
 
 Clone the Project Trellis repository and download the latest database:
 
-     git clone --recursive https://github.com/SymbiFlow/prjtrellis
+     git clone --recursive https://github.com/YosysHQ/prjtrellis
      
 Install _libtrellis_ and associated tools. You _must_ run `cmake` from the libtrellis directory.
 Out-of-tree builds are currently unsupported when coupled with `nextpnr`:
@@ -60,8 +60,8 @@
 ## For Developers
 
 Project Trellis documents the Lattice ECP5 bit-stream format and internal architecture. Current documentation is
-located in machine-readable format in [prjtrellis-db](https://github.com/SymbiFlow/prjtrellis-db)
-and is also [published online as HTML](https://symbiflow.github.io/prjtrellis-db/).
+located in machine-readable format in [prjtrellis-db](https://github.com/YosysHQ/prjtrellis-db)
+and is also [published online as HTML](https://yosyshq.github.io/prjtrellis-db/).
 
 This repository contains both tools and scripts which allow you to document the
 bit-stream format of Lattice ECP5 series FPGAs.
@@ -148,7 +148,7 @@
 ### Database
 
 Instead of downloading the
-[compiled part database](https://github.com/SymbiFlow/prjtrellis-db),
+[compiled part database](https://github.com/YosysHQ/prjtrellis-db),
 it can also be created from scratch. However, this procedure
 takes several hours, even on a decent workstation.
 First, the empty reference bitstreams and the tile layout must be created
diff --git a/tools/html_all.py b/tools/html_all.py
index 42edfcd..a796ee6 100755
--- a/tools/html_all.py
+++ b/tools/html_all.py
@@ -28,8 +28,8 @@
 <h1>Project Trellis HTML Documentation</h1>
 <p>Project Trellis is a project to document the ECP5 bitstream and internal architecture.</p>
 <p>This repository contains HTML documentation automatically generated from the
-<a href="https://github.com/SymbiFlow/prjtrellis">Project Trellis</a> database. The equivalent
-machine-readable data is located in <a href="https://github.com/SymbiFlow/prjtrellis-db">prjtrellis-db.<a/>
+<a href="https://github.com/YosysHQ/prjtrellis">Project Trellis</a> database. The equivalent
+machine-readable data is located in <a href="https://github.com/YosysHQ/prjtrellis-db">prjtrellis-db.<a/>
 Data generated includes tilemap data and bitstream data for many tile types. Click on any tile to see its bitstream
 documentation.
 </p>
@@ -38,7 +38,7 @@
 on the <a href="http://prjtrellis.readthedocs.io/en/latest/">Read the Docs</a> site.</p>
 
 <p>This HTML documentation was generated at ${datetime} from prjtrellis-db commit
-<a href="https://github.com/SymbiFlow/prjtrellis-db/tree/${commit}">${commit}</a>.</p>
+<a href="https://github.com/YosysHQ/prjtrellis-db/tree/${commit}">${commit}</a>.</p>
 <hr/>
 $docs_toc
 <hr/>