diff --git a/.github/workflows/book_stable.yml b/.github/workflows/book_stable.yml
index 6c3a50fb..344ddac3 100644
--- a/.github/workflows/book_stable.yml
+++ b/.github/workflows/book_stable.yml
@@ -16,27 +16,24 @@ jobs:
   build-book:
     runs-on: ubuntu-latest
     container: ghcr.io/fenics/dolfinx/lab:v0.6.0-r1
-   
+
     env:
-      PYVISTA_TRAME_SERVER_PROXY_PREFIX: '/proxy/'
+      PYVISTA_TRAME_SERVER_PROXY_PREFIX: "/proxy/"
       PYVISTA_TRAME_SERVER_PROXY_ENABLED: "True"
       PYVISTA_OFF_SCREEN: false
       PYVISTA_JUPYTER_BACKEND: "panel"
 
     steps:
+      - uses: actions/checkout@v4
 
-      - uses: actions/checkout@v3
-  
       - name: Install common packages
         uses: ./.github/actions/install-dependencies
 
       - name: Install book deps
-        run:
-          python3 -m pip install -r docker/requirements.txt
+        run: python3 -m pip install -r docker/requirements.txt
 
       - name: Build the book
-        run: 
-          jupyter-book build . -W
+        run: jupyter-book build . -W
 
       - uses: actions/upload-artifact@v3
         with:
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index dee6a8ca..bf1d5bdd 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -28,7 +28,7 @@ env:
 jobs:
   run-tests:
     uses: ./.github/workflows/test_stable.yml
-    
+
   build-book:
     uses: ./.github/workflows/book_stable.yml
 
@@ -38,14 +38,14 @@ jobs:
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
- 
+
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
-      
+        uses: actions/checkout@v4
+
       - name: Setup Pages
         uses: actions/configure-pages@v2
-  
+
       - name: Download docs artifact
         uses: actions/download-artifact@v3
         with:
diff --git a/.github/workflows/publish_docker.yml b/.github/workflows/publish_docker.yml
index d8abf4cf..d7113459 100644
--- a/.github/workflows/publish_docker.yml
+++ b/.github/workflows/publish_docker.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
diff --git a/.github/workflows/test_nightly.yml b/.github/workflows/test_nightly.yml
index 767c20f2..43293eff 100644
--- a/.github/workflows/test_nightly.yml
+++ b/.github/workflows/test_nightly.yml
@@ -24,27 +24,25 @@ jobs:
       PYVISTA_OFF_SCREEN: true
       DISPLAY: ":99.0"
       PYVISTA_JUPYTER_BACKEND: panel
-    
+
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Checkout release branch to work on schedule
       - name: Checkout release branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         if: ${{ github.event_name == 'schedule' }}
         with:
           ref: release
 
-      - name: Use current branch 
-        uses: actions/checkout@v3
+      - name: Use current branch
+        uses: actions/checkout@v4
         if: ${{ github.event_name != 'schedule' }}
 
       - name: Special handling of some installation
         uses: ./.github/actions/install-dependencies
 
       - name: Install requirements
-        run:
-          python3 -m pip install --no-cache-dir -r docker/requirements.txt --upgrade
-
+        run: python3 -m pip install --no-cache-dir -r docker/requirements.txt --upgrade
 
       - name: Test complex notebooks in parallel
         run: |
@@ -55,7 +53,7 @@ jobs:
           cd chapter1
           python3 complex_mode.py
           mpirun -n 2 python3 complex_mode.py
- 
+
       - name: Test real notebooks in parallel
         run: |
           cd chapter1
@@ -85,10 +83,8 @@ jobs:
           mpirun -n 2 python3 newton-solver.py
 
       - name: Test building the book
-        run: 
-          PYVISTA_OFF_SCREEN=false jupyter-book build  -W .
+        run: PYVISTA_OFF_SCREEN=false jupyter-book build  -W .
 
-      
       - uses: actions/upload-artifact@v3
         with:
           name: webpage
diff --git a/.github/workflows/test_stable.yml b/.github/workflows/test_stable.yml
index 465102dd..76f413e9 100644
--- a/.github/workflows/test_stable.yml
+++ b/.github/workflows/test_stable.yml
@@ -26,7 +26,7 @@ jobs:
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: ./.github/actions/install-dependencies
 
@@ -44,8 +44,7 @@ jobs:
           cd chapter1
           python3 complex_mode.py
           mpirun -n 2 python3 complex_mode.py
- 
-  
+
       - name: Test notebooks in parallel
         run: |
           python3 -c "from pyvista import start_xvfb; start_xvfb(0.1)"
@@ -78,4 +77,4 @@ jobs:
           name: DFG2D-3
           path: chapter2/figures
           retention-days: 2
-          if-no-files-found: error
\ No newline at end of file
+          if-no-files-found: error