diff --git a/embarkConfig/blockchain.js b/embarkConfig/blockchain.js
index ba5176c..ada23e1 100644
--- a/embarkConfig/blockchain.js
+++ b/embarkConfig/blockchain.js
@@ -4,10 +4,16 @@ module.exports = {
     enabled: true,
     rpcHost: "localhost", // HTTP-RPC server listening interface (default: "localhost")
     rpcPort: 8545, // HTTP-RPC server listening port (default: 8545)
-    rpcCorsDomain: "auto",  // Comma separated list of domains from which to accept cross origin requests (browser enforced)
+    rpcCorsDomain: {
+      auto: true,
+      additionalCors: ["http://localhost:3000"]
+    },  // Comma separated list of domains from which to accept cross origin requests (browser enforced)
                             // When set to "auto", Embark will automatically set the cors to the address of the webserver
     wsRPC: true, // Enable the WS-RPC server
-    wsOrigins: "auto",  // Origins from which to accept websockets requests
+    wsOrigins: {
+      auto: true,
+      additionalCors: ["http://localhost:3000"]
+    },  // Origins from which to accept websockets requests
                         // When set to "auto", Embark will automatically set the cors to the address of the webserver
     wsHost: "localhost", // WS-RPC server listening interface (default: "localhost")
     wsPort: 8546 // WS-RPC server listening port (default: 8546)
diff --git a/package.json b/package.json
index d6def1a..4754823 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "react-scripts": "2.1.8"
   },
   "scripts": {
-    "start": "PORT=3001 react-scripts start",
+    "start": "react-scripts start",
     "build": "react-scripts build",
     "test": "embark test",
     "eject": "react-scripts eject"