diff --git a/.github/workflows/mdbook.yml b/.github/workflows/mdbook.yml
index f9d0ef7..b3454fe 100644
--- a/.github/workflows/mdbook.yml
+++ b/.github/workflows/mdbook.yml
@@ -29,7 +29,7 @@ jobs:
         mdbook build
 
     - name: Deploy mdBook
-      uses: peaceiris/actions-gh-pages@v3
+      uses: peaceiris/actions-gh-pages@v4
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         publish_dir: ./book/book