diff --git a/.github/workflows/verify.yml b/.github/workflows/verify.yml
index 76c1ec7..45d6439 100644
--- a/.github/workflows/verify.yml
+++ b/.github/workflows/verify.yml
@@ -20,6 +20,5 @@ jobs:
         private-key: ${{ secrets.SSH_KEY }}
         public-key: ${{ secrets.SSH_KEY_PUBLIC }}
         name: 'id_rsa' # optional
-        known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
     - name: git clone through SSH
       run: git clone git@github.com:shimataro/ssh-key-action.git tmp