diff --git a/.github/workflows/ci-cd.yml b/.github/workflows/ci-cd.yml
index fbf3925..be79292 100644
--- a/.github/workflows/ci-cd.yml
+++ b/.github/workflows/ci-cd.yml
@@ -23,7 +23,7 @@ jobs:
     
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
@@ -49,7 +49,7 @@ jobs:
       
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3
@@ -93,7 +93,7 @@ jobs:
     
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index 1c3de8c..1151e67 100644
--- a/.github/workflows/claude-code-review.yml
+++ b/.github/workflows/claude-code-review.yml
@@ -27,7 +27,7 @@ jobs:
     
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 1790d4f..44d70d9 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@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/validate-pr.yml b/.github/workflows/validate-pr.yml
index b7de051..d2c684a 100644
--- a/.github/workflows/validate-pr.yml
+++ b/.github/workflows/validate-pr.yml
@@ -11,7 +11,7 @@ jobs:
     
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
@@ -33,7 +33,7 @@ jobs:
     
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3