diff --git a/.github/workflows/step-mutation-testing.yml b/.github/workflows/step-mutation-testing.yml
index 6bae2b8..d101094 100644
--- a/.github/workflows/step-mutation-testing.yml
+++ b/.github/workflows/step-mutation-testing.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Setup .NET Core