diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index fd36d48..dc3dd86 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -10,7 +10,7 @@ jobs:
     name: Pre Release
     runs-on: ubuntu-18.04
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2.3.4
 
       - uses: actions/setup-node@v1
         with:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f1898f6..f5182dd 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,7 +17,7 @@ jobs:
     name: Test for with parameter
     runs-on: ubuntu-18.04
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.3.4
 
     - name: Install dependencies
       run: yarn install
@@ -48,7 +48,7 @@ jobs:
     name: Test for getting image name from enviroment variable
     runs-on: ubuntu-18.04
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2.3.4
 
       - name: Install dependencies
         run: yarn install
@@ -78,7 +78,7 @@ jobs:
     name: Test not to create issue
     runs-on: ubuntu-18.04
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2.3.4
 
       - name: Install dependencies
         run: yarn install
diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index cca886a..f043676 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -14,7 +14,7 @@ jobs:
     name: Test with jest
     runs-on: ubuntu-18.04
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2.3.4
 
       - uses: actions/setup-node@v1
         with: