diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b7da864..3d0ef22 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
     name: Lint & Test Frontend
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Use Node.js 20
         uses: actions/setup-node@v4
@@ -50,7 +50,7 @@ jobs:
     name: Lint & Test Backend
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Use Node.js 20
         uses: actions/setup-node@v4
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index ed2ba45..e8702c9 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Deploy to EC2 via SSH
         uses: appleboy/ssh-action@v1.2.5
diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index c4d052b..509a480 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -19,7 +19,7 @@ jobs:
     timeout-minutes: 15
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Use Node.js 20
         uses: actions/setup-node@v4
diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index ecd1056..5f5b6e2 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -21,7 +21,7 @@ jobs:
         node-version: [18.x, 20.x, 22.x]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4
@@ -50,7 +50,7 @@ jobs:
         node-version: [20.x, 22.x]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4