diff --git a/.github/workflows/integrity.yml b/.github/workflows/integrity.yml
index 595426e..8de1f5d 100644
--- a/.github/workflows/integrity.yml
+++ b/.github/workflows/integrity.yml
@@ -6,7 +6,7 @@ jobs:
     name: check
     runs-on: ubuntu-latest    
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Install Python.
         uses: actions/setup-python@v4
         with: