diff --git a/.github/workflows/lint-actions.yaml b/.github/workflows/lint-actions.yaml
index 7324a32..1709beb 100644
--- a/.github/workflows/lint-actions.yaml
+++ b/.github/workflows/lint-actions.yaml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Check out Git repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Run black
       uses: psf/black@stable
       with:
@@ -24,7 +24,7 @@ jobs:
       with:
         python-version: '3.11'
     - name: Check out Git repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Install and configure Poetry
       uses: snok/install-poetry@v1
       with:
@@ -39,7 +39,7 @@ jobs:
   ruff:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: chartboost/ruff-action@v1
       with:
         version: 0.1.0
@@ -60,7 +60,7 @@ jobs:
         virtualenvs-create: true
         virtualenvs-path: ~/local/share/virtualenvs
     - name: Check out Git repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Install root, pip-licenses & pip-audit
       run: |
         poetry run pip install pip-licenses pip-audit
diff --git a/.github/workflows/maintenance.yaml b/.github/workflows/maintenance.yaml
index 328d87a..6f4f85a 100644
--- a/.github/workflows/maintenance.yaml
+++ b/.github/workflows/maintenance.yaml
@@ -20,7 +20,7 @@ jobs:
   auto-update:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - uses: actions/setup-python@v2
 
diff --git a/.github/workflows/test-and-build-action.yaml b/.github/workflows/test-and-build-action.yaml
index b711fd3..d79d878 100644
--- a/.github/workflows/test-and-build-action.yaml
+++ b/.github/workflows/test-and-build-action.yaml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
     - name: Check out repository code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Setup Python
       uses: actions/setup-python@v4
       with:
@@ -75,7 +75,7 @@ jobs:
     needs: test
     steps:
     - name: Check out repository code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Setup Python
       uses: actions/setup-python@v4
       with:
@@ -124,7 +124,7 @@ jobs:
         path: ~/.local/share/virtualenvs
         key: venv
     - name: Check out repository code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - run: |
         poetry build
     - name: Archive builds
@@ -139,7 +139,7 @@ jobs:
     needs: [build]
     steps:
     - name: Check out repository code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - uses: actions/download-artifact@v3
       with: