diff --git a/setup.cfg b/setup.cfg
index 2535af8..b96bae0 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -10,6 +10,7 @@ keywords = starlark
 license = Apache License 2.0
 license_file = LICENSE
 project_urls =
+  Documentation = https://python-starlark-go.readthedocs.io/en/latest/
   Bug Tracker = https://github.com/caketop/python-starlark-go/issues
   Source Code = https://github.com/caketop/python-starlark-go
 classifiers =