diff --git a/.github/workflows/book-next.yml b/.github/workflows/book-next.yml
index 51928b5..7fe0bf7 100644
--- a/.github/workflows/book-next.yml
+++ b/.github/workflows/book-next.yml
@@ -47,7 +47,7 @@ jobs:
           fail: true
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         # Only deploy when ref is next
         if: (github.event_name == 'push' && github.ref == 'refs/heads/next')
         with:
diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index ca0fdd2..5b725e6 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -47,7 +47,7 @@ jobs:
           fail: true
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         # Only deploy when ref is main
         if: (github.event_name == 'push' && github.ref == 'refs/heads/main')
         with: