diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index af4c899..0bb5e2e 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -32,7 +32,7 @@ jobs:
 
     - name: Build package
       run: |
-        python -m build
+        python -m build --sdist
 
     - name: Publish package distributions to PyPI
       uses: pypa/gh-action-pypi-publish@release/v1