diff --git a/.github/workflows/serverless-deploy.yml b/.github/workflows/serverless-deploy.yml
index 16a80d4..f7f074a 100644
--- a/.github/workflows/serverless-deploy.yml
+++ b/.github/workflows/serverless-deploy.yml
@@ -19,7 +19,7 @@ jobs:
       uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node-version }}
-    - run: npm ci
+    - run: yarn ci
     - name: serverless deploy
       uses: serverless/github-action@master
       with: