diff --git a/.github/workflows/ci-linux-ubuntu-latest.yml b/.github/workflows/ci-linux-ubuntu-latest.yml
index 900c2f8f5..c34d67afb 100644
--- a/.github/workflows/ci-linux-ubuntu-latest.yml
+++ b/.github/workflows/ci-linux-ubuntu-latest.yml
@@ -22,7 +22,7 @@ jobs:
         itest_group: [ "main_group", "html2pdf_group" ]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v6
diff --git a/.github/workflows/ci-mac.yml b/.github/workflows/ci-mac.yml
index 8752cff09..a994e7789 100644
--- a/.github/workflows/ci-mac.yml
+++ b/.github/workflows/ci-mac.yml
@@ -22,7 +22,7 @@ jobs:
         itest_group: [ "main_group", "html2pdf_group" ]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v6
diff --git a/.github/workflows/ci-windows-powershell.yml b/.github/workflows/ci-windows-powershell.yml
index 621219759..9c7ca2e3a 100644
--- a/.github/workflows/ci-windows-powershell.yml
+++ b/.github/workflows/ci-windows-powershell.yml
@@ -21,7 +21,7 @@ jobs:
         itest_group: [ "main_group", "html2pdf_group" ]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: "Print Debug info"
       run: |
diff --git a/.github/workflows/ci-windows.yml b/.github/workflows/ci-windows.yml
index 3be299317..47f723228 100644
--- a/.github/workflows/ci-windows.yml
+++ b/.github/workflows/ci-windows.yml
@@ -21,7 +21,7 @@ jobs:
         itest_group: [ "main_group", "html2pdf_group" ]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: "Print Debug info"
       run: |
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 1d27c6d5f..c6c37a92c 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -39,7 +39,7 @@ 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/docker.yml b/.github/workflows/docker.yml
index 231b2189b..2fe38d22b 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -10,7 +10,7 @@ jobs:
     timeout-minutes: 15
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Set up Python
       uses: actions/setup-python@v6
diff --git a/.github/workflows/end2end-tests.yml b/.github/workflows/end2end-tests.yml
index 4c784b9ec..c6bdb850d 100644
--- a/.github/workflows/end2end-tests.yml
+++ b/.github/workflows/end2end-tests.yml
@@ -28,7 +28,7 @@ jobs:
         ]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Set up Python 3.9
       uses: actions/setup-python@v6
@@ -56,7 +56,7 @@ jobs:
         python-version: ["3.9"]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v6
@@ -87,7 +87,7 @@ jobs:
         ]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Set up Python 3.9
       uses: actions/setup-python@v6
diff --git a/.github/workflows/periodic-integration-test.yml b/.github/workflows/periodic-integration-test.yml
index 30499a38b..466bae8b4 100644
--- a/.github/workflows/periodic-integration-test.yml
+++ b/.github/workflows/periodic-integration-test.yml
@@ -15,7 +15,7 @@ jobs:
     name: PIT – Linux
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up Python 3.
         uses: actions/setup-python@v6
@@ -38,7 +38,7 @@ jobs:
     name: PIT – Linux with PyInstaller
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up Python 3.
         uses: actions/setup-python@v6
@@ -69,7 +69,7 @@ jobs:
     name: PIT – macOS
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up Python 3.
         uses: actions/setup-python@v6
@@ -92,7 +92,7 @@ jobs:
     name: PIT – macOS with PyInstaller
     runs-on: macOS-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up Python 3.
         uses: actions/setup-python@v6
@@ -123,7 +123,7 @@ jobs:
     name: PIT – Check dead links
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up Python 3.
         uses: actions/setup-python@v6
diff --git a/.github/workflows/periodic-release-test.yml b/.github/workflows/periodic-release-test.yml
index e82541765..a03d84920 100644
--- a/.github/workflows/periodic-release-test.yml
+++ b/.github/workflows/periodic-release-test.yml
@@ -16,7 +16,7 @@ jobs:
     name: PRT – Linux
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up Python 3.
         uses: actions/setup-python@v6
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 62ebe0f53..d004f17b7 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with: