diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 04d716f..dbe0c65 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -20,7 +20,7 @@ jobs:
       - run: mdbook build book
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/master'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}