diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b8ede260..6012b640 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -309,7 +309,7 @@ jobs:
       - run: mdbook build doc
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: ${{ github.event_name == 'push' }}
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}