diff --git a/.github/workflows/buildtest.yml b/.github/workflows/buildtest.yml
index 3940272..059f467 100644
--- a/.github/workflows/buildtest.yml
+++ b/.github/workflows/buildtest.yml
@@ -19,7 +19,7 @@ jobs:
         stormpy_image: ["ci", "ci-debug"]
     steps:
       - name: Git clone
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Build dftlib from Dockerfile
         run: |
           docker build -t volkm/dftlib . \
@@ -46,7 +46,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - name: Git clone
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Build dftlib
         run: pip install -e .[${{ matrix.dependencies }}]
       - name: Run tests
@@ -70,7 +70,7 @@ jobs:
           sudo apt-get update
           sudo apt-get install -qq -y pandoc
       - name: Git clone
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Build dftlib
         run: pip install -e .[${{ matrix.dependencies }}]
       - name: Run tests
diff --git a/.github/workflows/formatapply.yml b/.github/workflows/formatapply.yml
index 93892d1..84eb295 100644
--- a/.github/workflows/formatapply.yml
+++ b/.github/workflows/formatapply.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: psf/black@stable
         with:
           options: ""
diff --git a/.github/workflows/formatcheck.yml b/.github/workflows/formatcheck.yml
index 4f40494..4b3b130 100644
--- a/.github/workflows/formatcheck.yml
+++ b/.github/workflows/formatcheck.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: psf/black@stable
       with:
         options: "--check --diff --color"
diff --git a/.github/workflows/publish_pypi.yml b/.github/workflows/publish_pypi.yml
index 8ecde2f..6a51336 100644
--- a/.github/workflows/publish_pypi.yml
+++ b/.github/workflows/publish_pypi.yml
@@ -18,7 +18,7 @@ jobs:
     name: Build wheels
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Set up Python
@@ -54,7 +54,7 @@ jobs:
           path: dist
           merge-multiple: true
       - name: Checkout test files
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: dist/test_files
           sparse-checkout: |
@@ -150,7 +150,7 @@ jobs:
           source venv/bin/activate
           python3 -m pip install "$WHEEL"
       - name: Checkout test files
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: dist/test_files
           sparse-checkout: |