diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 95238dc..f01fd02 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
     name: Runtime Dependency Audit (pip-audit)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
@@ -30,7 +30,7 @@ jobs:
     name: Docker Image Build & Non-Root Check
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - name: Build Docker image
         run: docker build -t cortex-mcp:ci .
       - name: Verify non-root container & package import
@@ -46,7 +46,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index c85a3ec..601c180 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -9,7 +9,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: astral-sh/setup-uv@v5
       - run: uv build
       - run: uvx twine check dist/*
diff --git a/.github/workflows/smoke-production.yml b/.github/workflows/smoke-production.yml
index 77c130f..2aa2bb0 100644
--- a/.github/workflows/smoke-production.yml
+++ b/.github/workflows/smoke-production.yml
@@ -17,5 +17,5 @@ jobs:
               || github.event.deployment.environment == 'pypi'))
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - run: python scripts/smoke_test.py "https://cortex-mcp-steel.vercel.app" 7 3 2