diff --git a/.github/workflows/verify-on-macos.yml b/.github/workflows/verify-on-macos.yml
index cc2420d..ad7454f 100644
--- a/.github/workflows/verify-on-macos.yml
+++ b/.github/workflows/verify-on-macos.yml
@@ -11,7 +11,6 @@ jobs:
       uses: shimataro/ssh-key-action@HEAD
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        public-key: ${{ secrets.SSH_KEY_PUBLIC }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
     - name: print created files
       run: ls -l ~/.ssh
@@ -25,7 +24,6 @@ jobs:
       uses: shimataro/ssh-key-action@HEAD
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        public-key: ${{ secrets.SSH_KEY_PUBLIC }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
         name: ssh_key_name # optional
         config: | # optional
diff --git a/.github/workflows/verify-on-ubuntu.yml b/.github/workflows/verify-on-ubuntu.yml
index 23277b9..98c240b 100644
--- a/.github/workflows/verify-on-ubuntu.yml
+++ b/.github/workflows/verify-on-ubuntu.yml
@@ -11,7 +11,6 @@ jobs:
       uses: shimataro/ssh-key-action@HEAD
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        public-key: ${{ secrets.SSH_KEY_PUBLIC }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
     - name: print created files
       run: ls -l ~/.ssh
@@ -25,7 +24,6 @@ jobs:
       uses: shimataro/ssh-key-action@HEAD
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        public-key: ${{ secrets.SSH_KEY_PUBLIC }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
         name: ssh_key_name # optional
         config: | # optional
diff --git a/.github/workflows/verify-on-ubuntu1604.yml b/.github/workflows/verify-on-ubuntu1604.yml
index d859300..bb3ccc5 100644
--- a/.github/workflows/verify-on-ubuntu1604.yml
+++ b/.github/workflows/verify-on-ubuntu1604.yml
@@ -11,7 +11,6 @@ jobs:
       uses: shimataro/ssh-key-action@HEAD
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        public-key: ${{ secrets.SSH_KEY_PUBLIC }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
     - name: print created files
       run: ls -l ~/.ssh
@@ -25,7 +24,6 @@ jobs:
       uses: shimataro/ssh-key-action@HEAD
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        public-key: ${{ secrets.SSH_KEY_PUBLIC }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
         name: ssh_key_name # optional
         config: | # optional
diff --git a/.github/workflows/verify-on-windows.yml b/.github/workflows/verify-on-windows.yml
index 5db775d..e76ce83 100644
--- a/.github/workflows/verify-on-windows.yml
+++ b/.github/workflows/verify-on-windows.yml
@@ -11,7 +11,6 @@ jobs:
       uses: shimataro/ssh-key-action@HEAD
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        public-key: ${{ secrets.SSH_KEY_PUBLIC }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
     - name: print created files
       run: ls ~/.ssh
@@ -25,7 +24,6 @@ jobs:
       uses: shimataro/ssh-key-action@HEAD
       with:
         private-key: ${{ secrets.SSH_KEY }}
-        public-key: ${{ secrets.SSH_KEY_PUBLIC }}
         known-hosts: ${{ secrets.KNOWN_HOSTS }} # optional
         name: ssh_key_name # optional
         config: | # optional
diff --git a/action.yml b/action.yml
index 9ab601b..3f5fdf5 100644
--- a/action.yml
+++ b/action.yml
@@ -9,9 +9,6 @@ inputs:
   private-key:
     description: "private SSH key"
     required: true
-  public-key:
-    description: "public SSH key"
-    required: true
   name:
     description: "SSH key file name (default: id_rsa)"
     required: false