diff --git a/package.json b/package.json
index 53af34e91..eb9907179 100644
--- a/package.json
+++ b/package.json
@@ -75,7 +75,7 @@
   },
   "scripts": {
     "ui-assets": "copy-aragon-ui-assets -n aragon-ui ./build",
-    "start": "npm run ui-assets && parcel serve src/index.html --port 3000 --out-dir ./build --no-cache",
+    "start": "scripts/start.sh",
     "start:local": "scripts/launch-local.sh",
     "start:mainnet": "REACT_APP_ETH_NETWORK_TYPE=mainnet npm start",
     "start:rinkeby": "npm start",
diff --git a/scripts/start.sh b/scripts/start.sh
new file mode 100755
index 000000000..1f5f2796b
--- /dev/null
+++ b/scripts/start.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+if [[ ${ARAGON_CLIENT_PORT} ]]; 
+then 
+  npm run ui-assets && parcel serve src/index.html --port $ARAGON_CLIENT_PORT --out-dir ./build --no-cache;
+else 
+  npm run ui-assets && parcel serve src/index.html --port 3000 --out-dir ./build --no-cache;
+fi;