diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 7775032..89e7000 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v2
diff --git a/.github/workflows/linters.yaml b/.github/workflows/linters.yaml
index fdafec0..08df26d 100644
--- a/.github/workflows/linters.yaml
+++ b/.github/workflows/linters.yaml
@@ -19,7 +19,7 @@ jobs:
           - pylint
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - name: Set up Python
@@ -39,7 +39,7 @@ jobs:
 
     steps:
       - name: Check out repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Run flake8 for Python 3
         uses: containerbuildsystem/actions/flake8@master
@@ -50,7 +50,7 @@ jobs:
 
     steps:
       - name: Check out repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Run markdownlint
         uses: containerbuildsystem/actions/markdownlint@master
diff --git a/.github/workflows/unittests.yaml b/.github/workflows/unittests.yaml
index b1c2b34..237b4b9 100644
--- a/.github/workflows/unittests.yaml
+++ b/.github/workflows/unittests.yaml
@@ -30,7 +30,7 @@ jobs:
     runs-on: ${{ matrix.env.os }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up Python ${{ matrix.env.python-version }}
       uses: actions/setup-python@v4