diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4cd27e2..7b1b24c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -49,7 +49,7 @@ jobs:
       - name: Push to gh-pages
         if: success() && github.event_name == 'push'
         # Don't use tags: https://julienrenaux.fr/2019/12/20/github-actions-security-risk/
-        uses: peaceiris/actions-gh-pages@bbdfb200618d235585ad98e965f4aafc39b4c501
+        uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./output