diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2383125..327a53a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: copy file via ssh password
       uses: ./
@@ -90,7 +90,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - run: echo hello > world.txt
 
@@ -119,7 +119,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Get changed files
       id: changed-files
@@ -143,7 +143,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: copy file to server
       uses: ./
@@ -160,7 +160,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: copy file to server
       uses: ./