diff --git a/.github/workflows/verify-on-macos.yml b/.github/workflows/verify-on-macos.yml
index 3e00ff7..9fd095f 100644
--- a/.github/workflows/verify-on-macos.yml
+++ b/.github/workflows/verify-on-macos.yml
@@ -7,8 +7,10 @@ jobs:
     name: Connect to github.com
     runs-on: macos-latest
     steps:
+    - name: Checkout source codes
+      uses: actions/checkout@v1
     - name: Install SSH key
-      uses: shimataro/ssh-key-action@feature/ci
+      uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
@@ -20,8 +22,10 @@ jobs:
     name: Connect to github.com with name and config
     runs-on: macos-latest
     steps:
+    - name: Checkout source codes
+      uses: actions/checkout@v1
     - name: Install SSH key
-      uses: shimataro/ssh-key-action@feature/ci
+      uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
diff --git a/.github/workflows/verify-on-ubuntu.yml b/.github/workflows/verify-on-ubuntu.yml
index 56af63a..e35a29d 100644
--- a/.github/workflows/verify-on-ubuntu.yml
+++ b/.github/workflows/verify-on-ubuntu.yml
@@ -7,8 +7,10 @@ jobs:
     name: Connect to github.com
     runs-on: ubuntu-latest
     steps:
+    - name: Checkout source codes
+      uses: actions/checkout@v1
     - name: Install SSH key
-      uses: shimataro/ssh-key-action@feature/ci
+      uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
@@ -20,8 +22,10 @@ jobs:
     name: Connect to github.com with name and config
     runs-on: ubuntu-latest
     steps:
+    - name: Checkout source codes
+      uses: actions/checkout@v1
     - name: Install SSH key
-      uses: shimataro/ssh-key-action@feature/ci
+      uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
diff --git a/.github/workflows/verify-on-ubuntu1604.yml b/.github/workflows/verify-on-ubuntu1604.yml
index 44f0acf..8c8a87b 100644
--- a/.github/workflows/verify-on-ubuntu1604.yml
+++ b/.github/workflows/verify-on-ubuntu1604.yml
@@ -7,8 +7,10 @@ jobs:
     name: Connect to github.com
     runs-on: ubuntu-16.04
     steps:
+    - name: Checkout source codes
+      uses: actions/checkout@v1
     - name: Install SSH key
-      uses: shimataro/ssh-key-action@feature/ci
+      uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
@@ -20,8 +22,10 @@ jobs:
     name: Connect to github.com with name and config
     runs-on: ubuntu-16.04
     steps:
+    - name: Checkout source codes
+      uses: actions/checkout@v1
     - name: Install SSH key
-      uses: shimataro/ssh-key-action@feature/ci
+      uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
diff --git a/.github/workflows/verify-on-windows.yml b/.github/workflows/verify-on-windows.yml
index f9823de..7e40adb 100644
--- a/.github/workflows/verify-on-windows.yml
+++ b/.github/workflows/verify-on-windows.yml
@@ -7,8 +7,10 @@ jobs:
     name: Connect to github.com
     runs-on: windows-latest
     steps:
+    - name: Checkout source codes
+      uses: actions/checkout@v1
     - name: Install SSH key
-      uses: shimataro/ssh-key-action@feature/ci
+      uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
@@ -20,8 +22,10 @@ jobs:
     name: Connect to github.com with name and config
     runs-on: windows-latest
     steps:
+    - name: Checkout source codes
+      uses: actions/checkout@v1
     - name: Install SSH key
-      uses: shimataro/ssh-key-action@feature/ci
+      uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional