diff --git a/.github/workflows/verify-on-macos.yml b/.github/workflows/verify-on-macos.yml
index 9fd095f..ff8daf5 100644
--- a/.github/workflows/verify-on-macos.yml
+++ b/.github/workflows/verify-on-macos.yml
@@ -13,7 +13,7 @@ jobs:
       uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
+        known_hosts: ${{ secrets.KNOWN_HOSTS }} # optional
     - name: print created files
       run: ls -l ~/.ssh
     - name: git clone through SSH
@@ -28,7 +28,7 @@ jobs:
       uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
+        known_hosts: ${{ secrets.KNOWN_HOSTS }} # optional
         name: ssh_key_name # optional
         config: | # optional
           Host github
diff --git a/.github/workflows/verify-on-ubuntu.yml b/.github/workflows/verify-on-ubuntu.yml
index e35a29d..84f5c45 100644
--- a/.github/workflows/verify-on-ubuntu.yml
+++ b/.github/workflows/verify-on-ubuntu.yml
@@ -13,7 +13,7 @@ jobs:
       uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
+        known_hosts: ${{ secrets.KNOWN_HOSTS }} # optional
     - name: print created files
       run: ls -l ~/.ssh
     - name: git clone through SSH
@@ -28,7 +28,7 @@ jobs:
       uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
+        known_hosts: ${{ secrets.KNOWN_HOSTS }} # optional
         name: ssh_key_name # optional
         config: | # optional
           Host github
diff --git a/.github/workflows/verify-on-ubuntu1604.yml b/.github/workflows/verify-on-ubuntu1604.yml
index 8c8a87b..bd2c085 100644
--- a/.github/workflows/verify-on-ubuntu1604.yml
+++ b/.github/workflows/verify-on-ubuntu1604.yml
@@ -13,7 +13,7 @@ jobs:
       uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
+        known_hosts: ${{ secrets.KNOWN_HOSTS }} # optional
     - name: print created files
       run: ls -l ~/.ssh
     - name: git clone through SSH
@@ -28,7 +28,7 @@ jobs:
       uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
+        known_hosts: ${{ secrets.KNOWN_HOSTS }} # optional
         name: ssh_key_name # optional
         config: | # optional
           Host github
diff --git a/.github/workflows/verify-on-windows.yml b/.github/workflows/verify-on-windows.yml
index 7e40adb..615be88 100644
--- a/.github/workflows/verify-on-windows.yml
+++ b/.github/workflows/verify-on-windows.yml
@@ -13,7 +13,7 @@ jobs:
       uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
+        known_hosts: ${{ secrets.KNOWN_HOSTS }} # optional
     - name: print created files
       run: ls ~/.ssh
     - name: git clone through SSH
@@ -28,7 +28,7 @@ jobs:
       uses: ./.
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
+        known_hosts: ${{ secrets.KNOWN_HOSTS }} # optional
         name: ssh_key_name # optional
         config: | # optional
           Host github