diff --git a/.github/workflows/build-deploy.yml b/.github/workflows/build-deploy.yml
index 02d76fe9..9b8b9b88 100644
--- a/.github/workflows/build-deploy.yml
+++ b/.github/workflows/build-deploy.yml
@@ -10,7 +10,7 @@ jobs:
     name: Build
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.1.0
 
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v1