diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index ab97411..f5192a2 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -12,7 +12,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: Setup Node.js environment
         uses: actions/setup-node@v2.1.5
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index d99e99b..654d3c7 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: Setup Node.js environment
         uses: actions/setup-node@v2.1.5