diff --git a/.github/workflows/publish_to_pypi.yaml b/.github/workflows/publish_to_pypi.yaml
index 443348c..a344963 100644
--- a/.github/workflows/publish_to_pypi.yaml
+++ b/.github/workflows/publish_to_pypi.yaml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-20.04
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Set up Python 3.9
       uses: actions/setup-python@v2