diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 87779aa..dc643df 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       # Checkout with full history for to allow compare with base branch
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - uses: actions/setup-python@v6
@@ -51,7 +51,7 @@ jobs:
   #   name: Build Documentation
   #   runs-on: ubuntu-latest
   #   steps:
-  #     - uses: actions/checkout@v5
+  #     - uses: actions/checkout@v6
   #     - uses: actions/setup-python@v6
   #       with:
   #         python-version: ${{ env.python_version}}
@@ -93,7 +93,7 @@ jobs:
     name: Report licences in use (SPDX)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ env.python_version}}
@@ -148,7 +148,7 @@ jobs:
           python -m pip install --upgrade pip
           python -m pip install detect-secrets==1.0.3
           python -m pip list
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       # FIXME gitleaks requires now a licence
@@ -193,7 +193,7 @@ jobs:
     name: Build and test
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with:
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index a41e127..ac914a6 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -38,7 +38,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 1581380..0d0760a 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -37,7 +37,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/dependabot.yml b/.github/workflows/dependabot.yml
index b86cc85..37fddc0 100644
--- a/.github/workflows/dependabot.yml
+++ b/.github/workflows/dependabot.yml
@@ -11,7 +11,7 @@ jobs:
     if: ${{ github.actor == 'dependabot[bot]' }}
     steps:
       # Checkout with full history for to allow compare with base branch
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - uses: actions/setup-python@v6
diff --git a/.github/workflows/dependency-review.yml b/.github/workflows/dependency-review.yml
index 046e9c8..3ea91b4 100644
--- a/.github/workflows/dependency-review.yml
+++ b/.github/workflows/dependency-review.yml
@@ -15,6 +15,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Checkout Repository'
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: 'Dependency Review'
         uses: actions/dependency-review-action@v4
diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index cd617bc..0d9a212 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup Python
         uses: actions/setup-python@v6
         with:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 1137036..60ba883 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -16,7 +16,7 @@ jobs:
     name: Carry out a release
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ env.python_version }}
diff --git a/.github/workflows/scorecards.yml b/.github/workflows/scorecards.yml
index e1d91e1..47c7838 100644
--- a/.github/workflows/scorecards.yml
+++ b/.github/workflows/scorecards.yml
@@ -32,7 +32,7 @@ jobs:
 
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493 # v3.1.0
+        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v3.1.0
         with:
           persist-credentials: false
 
diff --git a/news/20251121070630.bugfix b/news/20251121070630.bugfix
new file mode 100644
index 0000000..caacefe
--- /dev/null
+++ b/news/20251121070630.bugfix
@@ -0,0 +1 @@
+Dependency upgrade: checkout-6