diff --git a/lib/currency.js b/lib/currency.js
index d01c3cb..0c4a4e3 100644
--- a/lib/currency.js
+++ b/lib/currency.js
@@ -7,14 +7,14 @@ function CurrencyController(options) {
   var refresh = options.currencyRefresh || CurrencyController.DEFAULT_CURRENCY_DELAY;
   this.currencyDelay = refresh * 60000;
   this.bitstampRate = 0;
-  this.timestamp = + new Date();
+  this.timestamp = Date.now();
 }
 
 CurrencyController.DEFAULT_CURRENCY_DELAY = 10;
 
 CurrencyController.prototype.index = function(req, res) {
   var self = this;
-  var currentTime = + new Date();
+  var currentTime = Date.now();
   if (self.bitstampRate === 0 || currentTime >= (self.timestamp + self.currencyDelay)) {
     self.timestamp = currentTime;
     request('https://www.bitstamp.net/api/ticker/', function(err, response, body) {
diff --git a/test/currency.js b/test/currency.js
index 318ac34..6437e2c 100644
--- a/test/currency.js
+++ b/test/currency.js
@@ -43,7 +43,7 @@ describe('Currency', function() {
     };
     var currency = new TestCurrencyController({node: node});
     currency.bitstampRate = 220.20;
-    currency.timestamp = new Date() - 61000 * CurrencyController.DEFAULT_CURRENCY_DELAY;
+    currency.timestamp = Date.now() - 61000 * CurrencyController.DEFAULT_CURRENCY_DELAY;
     var req = {};
     var res = {
       jsonp: function(response) {
@@ -67,7 +67,7 @@ describe('Currency', function() {
     };
     var currency = new TestCurrencyController({node: node});
     currency.bitstampRate = 237.90;
-    currency.timestamp = new Date() - 65000 * CurrencyController.DEFAULT_CURRENCY_DELAY;
+    currency.timestamp = Date.now() - 65000 * CurrencyController.DEFAULT_CURRENCY_DELAY;
     var req = {};
     var res = {
       jsonp: function(response) {
@@ -93,7 +93,7 @@ describe('Currency', function() {
     };
     var currency = new TestCurrencyController({node: node});
     currency.bitstampRate = 237.90;
-    currency.timestamp = + new Date();
+    currency.timestamp = Date.now();
     var req = {};
     var res = {
       jsonp: function(response) {