diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9bc1134..78863f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -244,7 +244,7 @@ jobs:
 
       - name: Publish site
         if: github.event_name != 'pull_request' && github.ref == 'refs/heads/main'
-        uses: peaceiris/actions-gh-pages@v3.9.3
+        uses: peaceiris/actions-gh-pages@v4.0.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: docs/target/docs/site