diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index 5c6516a9..a7d41d19 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -27,7 +27,7 @@ jobs:
         run: make doc
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         with:
           publish_branch: gh-pages
           github_token: ${{ secrets.GITHUB_TOKEN }}