diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index 579853a..66b4bbe 100644
--- a/.github/workflows/claude-code-review.yml
+++ b/.github/workflows/claude-code-review.yml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 64a3e5b..c188310 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -26,7 +26,7 @@ jobs:
       actions: read # Required for Claude to read CI results on PRs
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index daf4e43..a120182 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -19,7 +19,7 @@ jobs:
     name: Project Validation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install dependencies
         run: |