diff --git a/.github/workflows/auto-approve-agent.yml b/.github/workflows/auto-approve-agent.yml
index d2c87be..c48eb68 100644
--- a/.github/workflows/auto-approve-agent.yml
+++ b/.github/workflows/auto-approve-agent.yml
@@ -18,7 +18,7 @@ jobs:
     
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0 # Get full history for comparison
 
diff --git a/.github/workflows/auto-assign-copilot.yml b/.github/workflows/auto-assign-copilot.yml
index 79233de..e19a300 100644
--- a/.github/workflows/auto-assign-copilot.yml
+++ b/.github/workflows/auto-assign-copilot.yml
@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Get merged PR details
         if: github.event_name == 'pull_request'
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bca4b80..37a7cf0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
     
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Check for merge conflicts markers
         run: |
@@ -37,7 +37,7 @@ jobs:
     
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       
       - name: Setup .NET 8.0
         uses: actions/setup-dotnet@v4
diff --git a/.github/workflows/pr-automation.yml b/.github/workflows/pr-automation.yml
index 391d557..f2feb57 100644
--- a/.github/workflows/pr-automation.yml
+++ b/.github/workflows/pr-automation.yml
@@ -15,7 +15,7 @@ jobs:
     
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Label by file changes
         uses: actions/github-script@v7
diff --git a/.github/workflows/stale-cleanup.yml b/.github/workflows/stale-cleanup.yml
index b0a2180..f78516c 100644
--- a/.github/workflows/stale-cleanup.yml
+++ b/.github/workflows/stale-cleanup.yml
@@ -79,7 +79,7 @@ jobs:
     
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0 # Get all branches
       
@@ -111,7 +111,7 @@ jobs:
     
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0