diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2e26b380..502cfe71 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -78,7 +78,7 @@ jobs:
       - name: Deploy to gh-pages
         if: success() && github.event_name != 'pull_request'
         # Don't use tags: https://julienrenaux.fr/2019/12/20/github-actions-security-risk/
-        uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e
+        uses: peaceiris/actions-gh-pages@84c30a85c19949d7eee79c4ff27748b70285e453
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: _build/html