diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index 69db94621..ef674f311 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -16,7 +16,7 @@ jobs:
           mdbook-version: 'latest'
       - run: mdbook build ./docs/book
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./docs/book/book