diff --git a/karma.conf.js b/karma.conf.js
index 4c574b7..07b4135 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -8,7 +8,7 @@ module.exports = function (config) {
     singleRun: true,
 
     frameworks: [ 'mocha' ],
-
+  
     files: [
       'tests.webpack.js'
     ],
diff --git a/src/server.js b/src/server.js
index 7c63a3f..37575c6 100755
--- a/src/server.js
+++ b/src/server.js
@@ -29,6 +29,18 @@ app.use('/api', (req, res) => {
   proxy.web(req, res);
 });
 
+// added the error handling to avoid https://github.com/nodejitsu/node-http-proxy/issues/527
+proxy.on('error', (error, req, res) => {
+  let json;
+  console.log('proxy error', error);
+  if (!res.headersSent) {
+    res.writeHead(500, {'content-type': 'application/json'});
+  }
+
+  json = { error: 'proxy_error', reason: error.message };
+  res.end(JSON.stringify(json));
+});
+
 app.use((req, res) => {
   if (__DEVELOPMENT__) {
     // Do not cache webpack stats: the script file would change since