diff --git a/.github/workflows/website.yaml b/.github/workflows/website.yaml
index cc873521..d2e35a45 100644
--- a/.github/workflows/website.yaml
+++ b/.github/workflows/website.yaml
@@ -32,7 +32,7 @@ jobs:
       - name: Build
         run: make -C docs/book build
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@373f7f263a76c20808c831209c920827a82a2847 # v3.9.3
+        uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e # v4.0.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./docs/book/book