diff --git a/.github/workflows/pythonpublish.yml b/.github/workflows/pythonpublish.yml
index 499cba6..64264ca 100644
--- a/.github/workflows/pythonpublish.yml
+++ b/.github/workflows/pythonpublish.yml
@@ -8,7 +8,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.5.0
     - name: Set up Python
       uses: actions/setup-python@v4.3.0
       with: