diff --git a/frontend/portal/next.config.js b/frontend/portal/next.config.js
index 502e4c9..ad01083 100644
--- a/frontend/portal/next.config.js
+++ b/frontend/portal/next.config.js
@@ -1,7 +1,9 @@
 const { i18n } = require('./next-i18next.config')
 const { PHASE_DEVELOPMENT_SERVER } = require('next/constants')
+const { loadEnvConfig } = require('@next/env')
+loadEnvConfig('./', process.env.NODE_ENV !== 'production')
 
-const port = process.env.PORT
+const port = process.env.PORT || 3000
 const serverApiUrl = process.env.SERVER_API_URL || 'http://localhost:8000'
 const siteId = process.env.SITE_ID || '3'
 const mode = siteId === '2' ? 'lg' : siteId === '3' ? 'sm' : 'sm'
diff --git a/frontend/portal/package.json b/frontend/portal/package.json
index 5c2690d..adfa64e 100644
--- a/frontend/portal/package.json
+++ b/frontend/portal/package.json
@@ -7,7 +7,7 @@
     "npm": "6.14.7"
   },
   "scripts": {
-    "dev": "cross-env next dev -p ${PORT-3000}",
+    "dev": "next dev",
     "dev:sm": "SITE_ID=3 npm run dev",
     "dev:lg": "SITE_ID=2 npm run dev",
     "dev:smWin": "set SITE_ID=3&&npm run dev",
@@ -35,7 +35,6 @@
     "axios": "^0.21.1",
     "cookies": "^0.8.0",
     "cors": "^2.8.5",
-    "cross-env": "^7.0.3",
     "date-fns": "^2.23.0",
     "date-fns-tz": "^1.1.6",
     "eventsource": "^1.1.0",