diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index edc8311..8781513 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
@@ -25,7 +25,7 @@ jobs:
   typecheck:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
@@ -40,7 +40,7 @@ jobs:
       matrix:
         python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
diff --git a/.github/workflows/example-usage.yml b/.github/workflows/example-usage.yml
index fdd4222..b896145 100644
--- a/.github/workflows/example-usage.yml
+++ b/.github/workflows/example-usage.yml
@@ -14,7 +14,7 @@ jobs:
   quality-gates:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 0  # Required for changed file detection
 
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 43673d8..a0c91b7 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -18,7 +18,7 @@ jobs:
     permissions:
       id-token: write   # required for PyPI Trusted Publishing (OIDC) — no API token needed
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v5