diff --git a/lib/core/config.js b/lib/core/config.js
index 3d76147a..e150397c 100644
--- a/lib/core/config.js
+++ b/lib/core/config.js
@@ -54,6 +54,8 @@ Config.prototype.loadConfigFiles = function(options) {
   this.loadWebServerConfigFile();
   this.loadChainTrackerFile();
   this.loadPluginContractFiles();
+
+  this._updateBlockchainCors();
 };
 
 Config.prototype.reloadConfig = function() {
@@ -66,6 +68,27 @@ Config.prototype.reloadConfig = function() {
   this.loadContractsConfigFile();
   this.loadExternalContractsFiles();
   this.loadChainTrackerFile();
+
+  this._updateBlockchainCors();
+};
+
+Config.prototype._updateBlockchainCors = function(){
+  let blockchainConfig = this.blockchainConfig;
+  let storageConfig = this.storageConfig;
+  let webServerConfig = this.webServerConfig;
+  let cors = '';
+
+  if(webServerConfig && webServerConfig.enabled) {
+    let webServerPort = webServerConfig.port ? `:${webServerConfig.port}` : '';
+    if(webServerConfig.host) cors = `http://${webServerConfig.host}${webServerPort}`;
+  }
+  if(storageConfig && storageConfig.enabled) {
+    let storagePort = storageConfig.port ? `:${storageConfig.port}` : '';
+    if(storageConfig.host) cors += `${cors.length ? ',' : ''}${storageConfig.protocol || 'http'}://${storageConfig.host}${storagePort}`;
+  }
+
+  if(blockchainConfig.rpcCorsDomain === 'auto' && cors.length) blockchainConfig.rpcCorsDomain = cors;
+  if(blockchainConfig.wsOrigins === 'auto' && cors.length) blockchainConfig.wsOrigins = cors;
 };
 
 Config.prototype._mergeConfig = function(configFilePath, defaultConfig, env, enabledByDefault) {
diff --git a/lib/i18n/locales/en.json b/lib/i18n/locales/en.json
index 416e9b8c..75427395 100644
--- a/lib/i18n/locales/en.json
+++ b/lib/i18n/locales/en.json
@@ -132,5 +132,11 @@
 	"This is known to cause issues with some applications, please consider reducing your DApp path's length to 66 characters or less.": "This is known to cause issues with some applications, please consider reducing your DApp path's length to 66 characters or less.",
 	"DApp path length is too long: ": "DApp path length is too long: ",
 	"WARNING! DApp path length is too long: ": "WARNING! DApp path length is too long: ",
-	"This is known to cause issues with starting geth, please consider reducing your DApp path's length to 66 characters or less.": "This is known to cause issues with starting geth, please consider reducing your DApp path's length to 66 characters or less."
+	"This is known to cause issues with starting geth, please consider reducing your DApp path's length to 66 characters or less.": "This is known to cause issues with starting geth, please consider reducing your DApp path's length to 66 characters or less.",
+	"Installing packages...": "Installing packages...",
+	"Next steps:": "Next steps:",
+	"open another console in the same directory and run": "open another console in the same directory and run",
+	"For more info go to http://embark.status.im": "For more info go to http://embark.status.im",
+	"%s is not installed on your machine": "%s is not installed on your machine",
+	"You can install it by visiting: %s": "You can install it by visiting: %s"
 }
\ No newline at end of file
diff --git a/lib/index.js b/lib/index.js
index 3245ac93..a4a809e1 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -49,19 +49,7 @@ class Embark {
 
   blockchain(env, client) {
     this.context = [constants.contexts.blockchain];
-    let blockchainConfig = this.config.blockchainConfig;
-    let storageConfig = this.config.storageConfig;
-    let webServerConfig = this.config.webServerConfig;
-
-    if(blockchainConfig.rpcCorsDomain === 'auto') {
-      if(webServerConfig) blockchainConfig.rpcCorsDomain = `http://${webServerConfig.host}:${webServerConfig.port}`;
-      if(storageConfig) blockchainConfig.rpcCorsDomain += `${blockchainConfig.rpcCorsDomain.length ? ',' : ''}${storageConfig.protocol}://${storageConfig.host}:${storageConfig.port}`;
-    }
-    if(blockchainConfig.wsOrigins === 'auto') {
-      if(webServerConfig) blockchainConfig.wsOrigins = `http://${webServerConfig.host}:${webServerConfig.port}`;
-      if(storageConfig) blockchainConfig.wsOrigins += `${blockchainConfig.wsOrigins.length ? ',' : ''}${storageConfig.protocol}://${storageConfig.host}:${storageConfig.port}`;
-    }
-    return require('./cmds/blockchain/blockchain.js')(blockchainConfig, client, env, this.isDev(env)).run();
+    return require('./cmds/blockchain/blockchain.js')(this.config.blockchainConfig, client, env, this.isDev(env)).run();
   }
 
   simulator(options) {
diff --git a/lib/modules/vyper/index.js b/lib/modules/vyper/index.js
index c8051531..10a603de 100644
--- a/lib/modules/vyper/index.js
+++ b/lib/modules/vyper/index.js
@@ -35,7 +35,15 @@ class Vyper {
     if (!contractFiles || !contractFiles.length) {
       return cb();
     }
+
+    const vyper = shelljs.which('vyper');
+    if (!vyper) {
+      self.logger.warn(__('%s is not installed on your machine', 'Vyper'));
+      self.logger.info(__('You can install it by visiting: %s', 'https://vyper.readthedocs.io/en/latest/installing-vyper.html'));
+      return cb();
+    }
     self.logger.info(__("compiling Vyper contracts") + "...");
+
     const compiled_object = {};
     async.each(contractFiles,
       function (file, fileCb) {
diff --git a/test_apps/test_app/config/storage.json b/test_apps/test_app/config/storage.json
index 55eb593a..a226dcb3 100644
--- a/test_apps/test_app/config/storage.json
+++ b/test_apps/test_app/config/storage.json
@@ -11,7 +11,7 @@
     "enabled": true,
     "provider": "swarm",
     "host": "swarm-gateways.net",
-    "port": 80,
+    "port": false,
     "getUrl": "http://swarm-gateways.net/bzzr:/"
   },
   "livenet": {