diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c54fe4a..fe89690 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
           node-version: 22
       - run: npm install
       - name: Build UI
-        run: cd packages/engine/ui && npm run build && cp dist/index.html ../src/ui.html
+        run: cd packages/engine/ui && npm install && npm run build && cp dist/index.html ../src/ui.html
       - name: Deploy to Cloudflare Workers
         run: cd packages/engine && npx wrangler deploy
         env: