diff --git a/package.json b/package.json
index cf58314ab..24722e405 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "scripts": {
     "ng": "ng",
     "start": "npm run server-versions && npm run build.libs.dev && ng serve --open",
-    "start:prod": "npm run server-versions && ng serve --prod --open",
+    "start:prod": "npm run server-versions && npm run build.libs.prod && ng serve --prod --open",
     "build.libs.dev": "ng build adf-extensions && ng build aca-dev-tools",
     "build.libs.prod": "ng build adf-extensions --prod && ng build aca-dev-tools --prod",
     "build": "npm run server-versions && npm run build.libs.prod && ng build --prod",