diff --git a/.github/workflows/build-documents.yml b/.github/workflows/build-documents.yml
index 1a76317..0d4ba23 100644
--- a/.github/workflows/build-documents.yml
+++ b/.github/workflows/build-documents.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Create tar.gz from templates directory contents
@@ -28,7 +28,7 @@ jobs:
           tar -czvf ../filters.tar.gz *
       - name: Checkout old version for redline
         if: ${{ github.event_name == 'pull_request' || github.event_name == 'push' }}
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.event.pull_request.base.sha || github.event.push.before }}
           path: old/
diff --git a/.github/workflows/check-no-stipulation.yml b/.github/workflows/check-no-stipulation.yml
index 5037e02..4d9fb01 100644
--- a/.github/workflows/check-no-stipulation.yml
+++ b/.github/workflows/check-no-stipulation.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Python Environment
         uses: actions/setup-python@v5
diff --git a/.github/workflows/check-sections.yml b/.github/workflows/check-sections.yml
index 963008f..947a1fa 100644
--- a/.github/workflows/check-sections.yml
+++ b/.github/workflows/check-sections.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Python Environment
         uses: actions/setup-python@v5
diff --git a/.github/workflows/test-tools.yml b/.github/workflows/test-tools.yml
index 5a6dbdd..9aecb3a 100644
--- a/.github/workflows/test-tools.yml
+++ b/.github/workflows/test-tools.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Python Environment
         uses: actions/setup-python@v5