diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index c0d02d74..d6264a8c 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -26,7 +26,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/deb-build.yml b/.github/workflows/deb-build.yml
index 77d1c45c..95331079 100644
--- a/.github/workflows/deb-build.yml
+++ b/.github/workflows/deb-build.yml
@@ -25,7 +25,7 @@ jobs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: true
 
@@ -48,7 +48,7 @@ jobs:
       matrix: ${{fromJSON(needs.check-architecture.outputs.matrix)}}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: true
 
diff --git a/.github/workflows/deb-release.yml b/.github/workflows/deb-release.yml
index 8d876d5c..c6448629 100644
--- a/.github/workflows/deb-release.yml
+++ b/.github/workflows/deb-release.yml
@@ -26,7 +26,7 @@ jobs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: true
 
@@ -50,7 +50,7 @@ jobs:
       matrix: ${{fromJSON(needs.check-architecture.outputs.matrix)}}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: true
           fetch-depth: 0
diff --git a/.github/workflows/deb-update-changelog.yml b/.github/workflows/deb-update-changelog.yml
index a119dd40..64404802 100644
--- a/.github/workflows/deb-update-changelog.yml
+++ b/.github/workflows/deb-update-changelog.yml
@@ -18,7 +18,7 @@ jobs:
     if: ${{ ! contains(github.event.head_commit.message, 'New changelog entry:') }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: true
 
diff --git a/.github/workflows/test-all-commits.yml b/.github/workflows/test-all-commits.yml
index a7669cbb..0ac0adba 100644
--- a/.github/workflows/test-all-commits.yml
+++ b/.github/workflows/test-all-commits.yml
@@ -7,7 +7,7 @@ jobs:
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout code
-       uses: actions/checkout@v3
+       uses: actions/checkout@v4
 
      - name: Setup Python
        uses: actions/setup-python@v4
@@ -38,7 +38,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       # Workaround: At the moment, only lock files in the project root are
       # supported...