diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 401cc70771b..5c2940eecf3 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Set up Git repository
-      uses: actions/checkout@v1
+      uses: actions/checkout@v2.3.4
 
     - name: Set up Ruby
       uses: actions/setup-ruby@v1