diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d64227e..576fdb3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ jobs:
         node-version: [10, 12, 14, 15, 16]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Setup Node
         uses: actions/setup-node@v2.1.5
         with: