diff --git a/.github/workflows/mdbook.yml b/.github/workflows/mdbook.yml
index 21c0296..2680f35 100644
--- a/.github/workflows/mdbook.yml
+++ b/.github/workflows/mdbook.yml
@@ -57,4 +57,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v4