diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 503de83..337a6d1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,7 +31,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Node.js
         uses: actions/setup-node@v6
         with:
@@ -60,7 +60,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Node.js
         uses: actions/setup-node@v6
         with:
@@ -84,7 +84,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Node.js
         uses: actions/setup-node@v6
         with:
@@ -109,7 +109,7 @@ jobs:
       contents: read
     continue-on-error: true
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Node.js
         uses: actions/setup-node@v6
         with:
@@ -133,7 +133,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Node.js
         uses: actions/setup-node@v6
         with:
@@ -163,7 +163,7 @@ jobs:
       pull-requests: write
       actions: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Node.js
         uses: actions/setup-node@v6
         with:
@@ -205,7 +205,7 @@ jobs:
       actions: write
     needs: [eslint, tsc, knip, unit_test, npm_audit, license-check]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Node.js
         uses: actions/setup-node@v6
         with: