diff --git a/.github/workflows/ci_tests.yml b/.github/workflows/ci_tests.yml
index 6edb3a7..72f392f 100644
--- a/.github/workflows/ci_tests.yml
+++ b/.github/workflows/ci_tests.yml
@@ -97,7 +97,7 @@ jobs:
           name: rendered-book-sha-${{ github.sha }}
           path: dev
       - name: Deploy pages
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: dev