diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 20427cfa37..f926f3b1e1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -262,7 +262,7 @@ jobs:
         run: ./monitoring/github_pages/make_site_content.sh
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@373f7f263a76c20808c831209c920827a82a2847  # v3.9.3
+        uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e  # v4.0.0
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}