diff --git a/lib/routes.js b/lib/routes.js
index 77c3ab3e..86d231c0 100644
--- a/lib/routes.js
+++ b/lib/routes.js
@@ -9,6 +9,8 @@ var logger = require('./logger');
 var STALE_TICKER  = 180000;
 var STALE_BALANCE = 180000;
 
+var API_VERSION = 1;
+
 Error.prototype.toJSON = function () {
   var self = this;
   var ret = {};
@@ -47,6 +49,7 @@ var poll = function(req, res) {
 
   res.json({
     err: null,
+    version: API_VERSION,
     rate: rate * _trader.config.exchanges.settings.commission,
     fiat: fiatBalance,
     locale: _trader.config.brain.locale,