diff --git a/.github/workflows/CI.yaml b/.github/workflows/CI.yaml
index 98d904b..642c0d3 100644
--- a/.github/workflows/CI.yaml
+++ b/.github/workflows/CI.yaml
@@ -10,7 +10,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3.1.0
 
     - name: Setup .NET
       uses: actions/setup-dotnet@v1