diff --git a/.github/workflows/deploy-gh-pages.yml b/.github/workflows/deploy-gh-pages.yml
index ca6483d802..df78baa4ac 100644
--- a/.github/workflows/deploy-gh-pages.yml
+++ b/.github/workflows/deploy-gh-pages.yml
@@ -39,6 +39,10 @@ jobs:
         run: npm install
         working-directory: web-chat
 
+      - name: build web app
+        run: npm run build
+        working-directory: web-chat
+
       - name: Deploy web chat app on gh pages
         uses: peaceiris/actions-gh-pages@v3
         with: