diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5036f0a..2b4542e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,7 +11,7 @@ jobs:
   deploy-book:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     # Install dependencies
     - name: Set up Python 3.8