diff --git a/.github/workflows/python-unittest-on-pr-and-push.yml b/.github/workflows/python-unittest-on-pr-and-push.yml
index fa7004f..8267f22 100644
--- a/.github/workflows/python-unittest-on-pr-and-push.yml
+++ b/.github/workflows/python-unittest-on-pr-and-push.yml
@@ -16,6 +16,6 @@ jobs:
         operating-system: [ubuntu-latest, macos-latest, windows-latest]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Python unittest
-      run: python3 -m unittest --verbose
\ No newline at end of file
+      run: python3 -m unittest --verbose