diff --git a/.github/workflows/architectural-compliance.yml b/.github/workflows/architectural-compliance.yml
index a4fd58b..7bc103a 100644
--- a/.github/workflows/architectural-compliance.yml
+++ b/.github/workflows/architectural-compliance.yml
@@ -31,7 +31,7 @@ jobs:
         fetch-depth: 0  # Full history for diff analysis
 
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: '3.12'
         cache: 'pip'
diff --git a/.github/workflows/architectural-tests.yml b/.github/workflows/architectural-tests.yml
index 67c5c8f..bac96f3 100644
--- a/.github/workflows/architectural-tests.yml
+++ b/.github/workflows/architectural-tests.yml
@@ -60,7 +60,7 @@ jobs:
           fetch-depth: 0  # Full history for historical analysis
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           cache: 'pip'
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7b5cd45..7e31a0d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           cache: 'pip'
@@ -61,7 +61,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           cache: 'pip'
diff --git a/.github/workflows/claude-code-architectural-audit.yml b/.github/workflows/claude-code-architectural-audit.yml
index 25ac236..ba534dc 100644
--- a/.github/workflows/claude-code-architectural-audit.yml
+++ b/.github/workflows/claude-code-architectural-audit.yml
@@ -27,7 +27,7 @@ jobs:
         fetch-depth: 0  # Full history for comprehensive analysis
 
     - name: Setup Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ env.PYTHON_VERSION }}
 
diff --git a/.github/workflows/pr-validation.yml b/.github/workflows/pr-validation.yml
index de378c2..efa55eb 100644
--- a/.github/workflows/pr-validation.yml
+++ b/.github/workflows/pr-validation.yml
@@ -26,7 +26,7 @@ jobs:
           fetch-depth: 0  # For better analysis
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.12'
           cache: 'pip'
@@ -102,7 +102,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.12'
           cache: 'pip'
@@ -135,7 +135,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.12'
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 2efafe1..235bf89 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.12'
 
diff --git a/.github/workflows/security-ci-validation.yml b/.github/workflows/security-ci-validation.yml
index 617dff9..c472db3 100644
--- a/.github/workflows/security-ci-validation.yml
+++ b/.github/workflows/security-ci-validation.yml
@@ -37,7 +37,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.12'
 
@@ -242,7 +242,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.12'