diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 868e429..ef70f9d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install uv
         uses: astral-sh/setup-uv@v5
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index df44514..c85e46f 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -20,7 +20,7 @@ jobs:
   analyze:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v3
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index aad18e9..056bef3 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -24,7 +24,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install uv
         uses: astral-sh/setup-uv@v5
diff --git a/.github/workflows/release-check.yml b/.github/workflows/release-check.yml
index af92b34..793e654 100644
--- a/.github/workflows/release-check.yml
+++ b/.github/workflows/release-check.yml
@@ -15,7 +15,7 @@ jobs:
   artifacts:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install uv
         uses: astral-sh/setup-uv@v5
diff --git a/.github/workflows/secret-patterns.yml b/.github/workflows/secret-patterns.yml
index f7a884d..3a7167c 100644
--- a/.github/workflows/secret-patterns.yml
+++ b/.github/workflows/secret-patterns.yml
@@ -12,7 +12,7 @@ jobs:
   scan:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Run open-source content audit
         run: python3 scripts/open_source_audit.py --target public-repo