diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 373b280..e1a796a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     
     - name: Use Node.js 20
       uses: actions/setup-node@v4
@@ -40,7 +40,7 @@ jobs:
     needs: test
     
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     
     - name: Use Node.js 20
       uses: actions/setup-node@v4
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 71b68ac..8d5815f 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -25,7 +25,7 @@ jobs:
       id-token: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b1a0795..0b083f3 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     
     - name: Use Node.js 20
       uses: actions/setup-node@v4