diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 39ccf18..5165a2b 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 4dbfc06..c60b48d 100644
--- a/.github/workflows/linters.yaml
+++ b/.github/workflows/linters.yaml
@@ -28,7 +28,7 @@ jobs:
             engine: docker
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -47,7 +47,7 @@ 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
@@ -58,7 +58,7 @@ jobs:
 
     steps:
       - name: Check out repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Run markdownlint
         uses: containerbuildsystem/actions/markdownlint@master
@@ -81,7 +81,7 @@ jobs:
             engine: docker
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - run: ./test.sh
         env:
@@ -97,7 +97,7 @@ jobs:
 
     steps:
       - name: Check out repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Run ShellCheck
         uses: containerbuildsystem/actions/shellcheck@master
diff --git a/.github/workflows/unittests.yaml b/.github/workflows/unittests.yaml
index dbb20c9..aa3f6e0 100644
--- a/.github/workflows/unittests.yaml
+++ b/.github/workflows/unittests.yaml
@@ -34,7 +34,7 @@ jobs:
 
     steps:
       - name: Check out repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: pytests via test.sh
         env: