diff --git a/.github/workflows/build-docs.yml b/.github/workflows/build-docs.yml
index 778a65ce..bb9e9df9 100644
--- a/.github/workflows/build-docs.yml
+++ b/.github/workflows/build-docs.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
     - name: Check out the main branch
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       # We need a full clone rather than a shallow clone so that setuptools-scm
       # can compute the right version number for the docs.
       # xref: https://github.com/pypa/setuptools_scm/issues/431
diff --git a/.github/workflows/check-style.yml b/.github/workflows/check-style.yml
index 99247eb8..fac082dd 100644
--- a/.github/workflows/check-style.yml
+++ b/.github/workflows/check-style.yml
@@ -15,7 +15,7 @@ jobs:
       with:
         python-version: '3.10'
     - name: Check out the target commit
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Install necessary Python packages
       run: |
         python -m pip install -r style-requirements.txt
diff --git a/.github/workflows/publish-on-pypi.yml b/.github/workflows/publish-on-pypi.yml
index 50fc3ca0..db0b63b0 100644
--- a/.github/workflows/publish-on-pypi.yml
+++ b/.github/workflows/publish-on-pypi.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
     - name: Check out the release commit
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 30fed8c2..c706a5b2 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -19,7 +19,7 @@ jobs:
 
     steps:
     - name: Check out the target commit
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Install Linux packages for PySide6 support
       run: |
         sudo apt-get update
@@ -63,7 +63,7 @@ jobs:
 
     steps:
     - name: Check out the target commit
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Install Linux packages for wx support
       run: |
         sudo apt-get update
diff --git a/.github/workflows/test-docs.yml b/.github/workflows/test-docs.yml
index ee3a9bfb..4c781af4 100644
--- a/.github/workflows/test-docs.yml
+++ b/.github/workflows/test-docs.yml
@@ -19,7 +19,7 @@ jobs:
       with:
         python-version: '3.10'
     - name: Check out the target commit
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Install local package and documentation dependencies
       run: |
         python -m pip install -r docs/requirements.txt
diff --git a/.github/workflows/weekly-scheduled-tests.yml b/.github/workflows/weekly-scheduled-tests.yml
index 4c1ccc91..dd497965 100644
--- a/.github/workflows/weekly-scheduled-tests.yml
+++ b/.github/workflows/weekly-scheduled-tests.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
     - name: Check out the target commit
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
@@ -44,7 +44,7 @@ jobs:
 
     steps:
     - name: Check out the main branch
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Install Linux packages for PySide6 support
       run: |
         sudo apt-get update