diff --git a/docs/index.md b/docs/index.md
index 05adc08f..bc4da7e2 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -39,6 +39,14 @@ The rest of this documentation is organised into the following sections:
 ```{tableofcontents}
 ```
 
+## Source code
+
+The source code for `tsdate` is freely available on [GitHub](https://github.com/tskit-dev/tsdate).
+Bug reports and suggestions for improvements can be made by opening an issue on that repository:
+we suggest also checking the [discussions list](https://github.com/tskit-dev/tsdate/discussions).
+Pull requests are welcome: we largely follow the
+[tskit development workflow](https://tskit.dev/tskit/docs/latest/development.html#workflow).
+
 ## Citing
 
 The algorithm is described in [our Science paper](https://www.science.org/doi/10.1126/science.abi8264)
diff --git a/docs/introduction.md b/docs/introduction.md
index b3ae57a1..af5d9af6 100644
--- a/docs/introduction.md
+++ b/docs/introduction.md
@@ -52,6 +52,9 @@ The output of tsdate is a new tree sequence with altered
 (optionally) a posterior distribution of node times
 (see {ref}`sec_usage_posterior`).
 
+The ultimate source of technical detail for `tsdate` is the source code on our
+[GitHub repository](http://github.com/tskit-dev/tsdate).
+
 ## Sources of genealogies
 
 The input genealogies to date can come from any source,