diff --git a/.github/workflows/code-quality.yml b/.github/workflows/code-quality.yml
index 354735f..f0321b9 100644
--- a/.github/workflows/code-quality.yml
+++ b/.github/workflows/code-quality.yml
@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Shallow clones should be disabled for better analysis
 
diff --git a/.github/workflows/dependency-review.yml b/.github/workflows/dependency-review.yml
index 94a7149..2801b80 100644
--- a/.github/workflows/dependency-review.yml
+++ b/.github/workflows/dependency-review.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Dependency Review
         uses: actions/dependency-review-action@v4
diff --git a/.github/workflows/dependency-submission.yml b/.github/workflows/dependency-submission.yml
index 26b60b8..069424e 100644
--- a/.github/workflows/dependency-submission.yml
+++ b/.github/workflows/dependency-submission.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
diff --git a/.github/workflows/dotnet-security-scan.yml b/.github/workflows/dotnet-security-scan.yml
index 7df3b63..cff3132 100644
--- a/.github/workflows/dotnet-security-scan.yml
+++ b/.github/workflows/dotnet-security-scan.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
diff --git a/.github/workflows/integration-tests.yml b/.github/workflows/integration-tests.yml
index 050ce60..890044a 100644
--- a/.github/workflows/integration-tests.yml
+++ b/.github/workflows/integration-tests.yml
@@ -43,7 +43,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/license-compliance.yml b/.github/workflows/license-compliance.yml
index da9ed00..9ecb592 100644
--- a/.github/workflows/license-compliance.yml
+++ b/.github/workflows/license-compliance.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
diff --git a/.github/workflows/pr-quality-gate.yml b/.github/workflows/pr-quality-gate.yml
index 0f860b3..a339a8c 100644
--- a/.github/workflows/pr-quality-gate.yml
+++ b/.github/workflows/pr-quality-gate.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -101,7 +101,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Verify required files exist
         run: |
@@ -130,7 +130,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -167,7 +167,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Auto-label PR
         uses: actions/labeler@v5
diff --git a/.github/workflows/sbom-generation.yml b/.github/workflows/sbom-generation.yml
index a121815..ceda8ff 100644
--- a/.github/workflows/sbom-generation.yml
+++ b/.github/workflows/sbom-generation.yml
@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
diff --git a/.github/workflows/secret-scanning.yml b/.github/workflows/secret-scanning.yml
index 71678d2..e3eab1f 100644
--- a/.github/workflows/secret-scanning.yml
+++ b/.github/workflows/secret-scanning.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Full history for comprehensive scan
 
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 4f858f0..72f1e76 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -36,7 +36,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0