diff --git a/.github/workflows/github-pages.yml b/.github/workflows/github-pages.yml
index 59eb6a8..0c2a260 100644
--- a/.github/workflows/github-pages.yml
+++ b/.github/workflows/github-pages.yml
@@ -11,7 +11,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v2
         with: