diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index e928fb5..17cce23 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -28,7 +28,7 @@ jobs:
         with:
           name: book
           path: ./book
-      - uses: peaceiris/actions-gh-pages@373f7f263a76c20808c831209c920827a82a2847 # v3.9.3
+      - uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e # v4.0.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./book