diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 19257963..d3b93161 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -24,6 +24,7 @@ jobs:
           extra-specs: |
             python=3.9
             jupyterlab=4
+            yarn=3
 
       - name: Setup pip cache
         uses: actions/cache@v2
@@ -61,6 +62,7 @@ jobs:
         shell: bash -l {0}
         run: |
           set -eux
+          yarn install
           yarn dev
           jupyter labextension list 2>&1 | grep -ie "jupytercad-core.*OK"
           jupyter labextension list 2>&1 | grep -ie "jupytercad-lab.*OK"
diff --git a/.github/workflows/check-release.yml b/.github/workflows/check-release.yml
index 2dcaf6b3..a768f776 100644
--- a/.github/workflows/check-release.yml
+++ b/.github/workflows/check-release.yml
@@ -16,6 +16,7 @@ jobs:
       - name: Install Dependencies
         run: |
           pip install "jupyterlab>=4.0.0,<5"
+          npm install --global yarn@3
       - name: Check Release
         uses: jupyter-server/jupyter_releaser/.github/actions/check-release@v2
         with: