diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0a7239e..f2a5e92 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,7 +24,7 @@ jobs:
         - 6379:6379
         options: --entrypoint redis-server
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: Use Node.js
         uses: actions/setup-node@v2.1.5