diff --git a/lib/fileServer.js b/lib/fileServer.js
index 2a9946c..d7356eb 100644
--- a/lib/fileServer.js
+++ b/lib/fileServer.js
@@ -32,7 +32,6 @@ handleResponse = function (request, response) {
   // Handle only GET requests for /nowjs/* files. Pass all other requests through
   var i;
   if (request.method === 'GET') {
-
     // Detect if request involves the now.js file
     if (request.url.split('?')[0] === '/nowjs/now.js') {
       serveFile(__dirname + nowClient, request, response, options);
@@ -75,8 +74,7 @@ serveFile = function (filename, request, response, options) {
         // Determine hostname / port if not given in options
         var host = request.headers.host.split(':');
         var hostServer = options['host'] || host[0];
-        var hostPort =  options['port'] || host[1] || '80';
-
+        var hostPort =  options['port'] || host[1] || ((request.headers.referer.split(':')[0] === 'https') ? '443' : '80');
         // Call generate client libs, which takes the desired host/port and executes callback with two parts of now.js as parameters
         generateClientLibs(hostServer, hostPort, function (nowText) {