diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 7b1d9e1..59884a2 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -41,7 +41,7 @@ jobs:
           auto-update-conda: true
       - run: make devinstall
       - run: make doctest
-      - uses: peaceiris/actions-gh-pages@v3.9.3
+      - uses: peaceiris/actions-gh-pages@v4.0.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: doc/_build/html