diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index a6d24ed8..40bdd71d 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -35,4 +35,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v4