diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 64ca6fe..926813b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,13 +16,13 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Base Setup
       uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
 
     - name: Install Conda environment with Micromamba
-      uses: mamba-org/setup-micromamba@v1
+      uses: mamba-org/setup-micromamba@v2
       with:
         environment-name: xeus-lite-dev
         environment-file: environment-dev.yaml
@@ -55,7 +55,7 @@ jobs:
         pip uninstall -y "jupyterlite_xeus" jupyterlab
 
     - name: Upload extension packages
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: extension-artifacts
         path: dist/jupyterlite_xeus*
@@ -69,9 +69,9 @@ jobs:
     - name: Install Python
       uses: actions/setup-python@v4
       with:
-        python-version: '3.9'
+        python-version: '3.13'
         architecture: 'x64'
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: extension-artifacts
     - name: Install and Test
@@ -93,16 +93,15 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: extension-artifacts
 
       - name: Install Conda environment with Micromamba
-        uses: mamba-org/setup-micromamba@v1
+        uses: mamba-org/setup-micromamba@v2
         with:
-          micromamba-version: '1.5.10-0'
           environment-file: environment-dev.yaml
 
       - name: Make sure the Mamba Python API is available
@@ -122,16 +121,15 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: extension-artifacts
 
       - name: Install Conda environment with Micromamba
-        uses: mamba-org/setup-micromamba@v1
+        uses: mamba-org/setup-micromamba@v2
         with:
-          micromamba-version: '1.5.10-0'
           environment-file: environment-dev.yaml
 
       - name: Install mamba
@@ -150,16 +148,15 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: extension-artifacts
 
       - name: Install mamba
-        uses: mamba-org/setup-micromamba@v1
+        uses: mamba-org/setup-micromamba@v2
         with:
-          micromamba-version: '1.5.10-0'
           environment-file: environment-dev.yaml
           environment-name: xeus-lite-dev
 
@@ -176,16 +173,15 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: extension-artifacts
 
       - name: Install Conda environment with Micromamba
-        uses: mamba-org/setup-micromamba@v1
+        uses: mamba-org/setup-micromamba@v2
         with:
-          micromamba-version: '1.5.10-0'
           environment-file: environment-dev.yaml
 
       - name: Install
@@ -212,18 +208,18 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Base Setup
       uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
 
     - name: Download extension package
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         name: extension-artifacts
 
     - name: Install Conda environment with Micromamba
-      uses: mamba-org/setup-micromamba@v1
+      uses: mamba-org/setup-micromamba@v2
       with:
         environment-name: test-env
         create-args: >-
@@ -255,9 +251,9 @@ jobs:
 
     - name: Upload Playwright Test report
       if: always()
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
-        name: jupyterlite-xeus-playwright-tests (${{ matrix.jupyterlite_version }})
+        name: jupyterlite-xeus-playwright-tests (${{ matrix.jupyterlite_version }}, ${{ matrix.project }})
         path: |
           ui-tests/test-results
           ui-tests/playwright-report
@@ -267,6 +263,6 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
       - uses: jupyterlab/maintainer-tools/.github/actions/check-links@v1
diff --git a/.github/workflows/check-release.yml b/.github/workflows/check-release.yml
index 8fcfddb..23e6548 100644
--- a/.github/workflows/check-release.yml
+++ b/.github/workflows/check-release.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Base Setup
         uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
       - name: Check Release
@@ -20,7 +20,7 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Upload Distributions
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: jupyterlite_xeus-releaser-dist-${{ github.run_number }}
           path: .jupyter_releaser_checkout/dist