diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3287989..1962eac 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
       matrix:
         python-version: ["3.10", "3.12", "3.14"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-python@v5
         with:
@@ -42,7 +42,7 @@ jobs:
   package:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-python@v5
         with:
@@ -63,7 +63,7 @@ jobs:
   lint-docs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Check JSON files
         run: python -c "import json; [json.load(open(f)) for f in ['.mcp.json']]; print('JSON OK')"
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index c49b6dc..50258ae 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -16,7 +16,7 @@ jobs:
       matrix:
         language: [python]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: github/codeql-action/init@v3
         with:
           languages: ${{ matrix.language }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b4fc6a4..f8429de 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,7 +12,7 @@ jobs:
       id-token: write          # Required for PyPI trusted publishing
     environment: pypi           # Must match PyPI trusted publisher config
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-python@v5
         with: