diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 439bc31..02243fe 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,7 +11,7 @@ jobs:
   check_pr:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2.3.4
 
       - name: "yarn install"
         run: yarn install
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 903115e..e16be26 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,7 +5,7 @@ jobs:
   check_pr:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.3.4
 
     - name: "yarn install"
       run: yarn install