diff --git a/pyproject.toml b/pyproject.toml
index a5ef9ceb..7e17b148 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,6 +50,7 @@ file = 'LICENSE.txt'
 
 [project.urls]
 Homepage = 'https://numpydoc.readthedocs.io'
+Source = 'https://github.com/numpy/numpydoc/'
 
 [project.optional-dependencies]
 doc = [
diff --git a/tools/pyproject.toml.in b/tools/pyproject.toml.in
index 8ca66ca7..51d33b64 100644
--- a/tools/pyproject.toml.in
+++ b/tools/pyproject.toml.in
@@ -40,6 +40,7 @@ email = "pav@iki.fi"
 
 [project.urls]
 Homepage = "https://numpydoc.readthedocs.io"
+Source = "https://github.com/numpy/numpydoc/"
 
 [project.optional-dependencies]