diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a29f1e9..4dc2dab 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ jobs:
 
     steps:
 
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: Use Node.js
         uses: actions/setup-node@v2.1.5