diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8380289..ffd57a8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Run markdownlint-cli
         uses: nosborn/github-action-markdown-cli@v3.5.0
         with:
@@ -38,7 +38,7 @@ jobs:
           - '3.12'
           - '3.13'
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python
         uses: actions/setup-python@v6
         with:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index fd21530..9405615 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -17,7 +17,7 @@ jobs:
     if: ${{ github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'push' && startsWith(github.event.workflow_run.head_branch, 'v') }}
     steps:
       - name: Check out the repository including tags
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.event.workflow_run.head_sha }}
           fetch-depth: 0
@@ -51,7 +51,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ needs.validate-tag.outputs.valid_tag == 'true' && github.event.workflow_run.conclusion == 'success' }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v6
diff --git a/.github/workflows/sync-test-fixtures.yml b/.github/workflows/sync-test-fixtures.yml
index a1468a3..c994301 100644
--- a/.github/workflows/sync-test-fixtures.yml
+++ b/.github/workflows/sync-test-fixtures.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Sync fixtures
         run: |
           TMP_DIR=$(mktemp -d)