diff --git a/lib/pushnotificationsservice.js b/lib/pushnotificationsservice.js
index 493689f..badd855 100644
--- a/lib/pushnotificationsservice.js
+++ b/lib/pushnotificationsservice.js
@@ -370,7 +370,7 @@ PushNotificationsService.prototype._makeRequest = function(opts, cb) {
     url: self.pushServerUrl + '/send',
     method: 'POST',
     json: true,
-    header: {
+    headers: {
       'Content-Type': 'application/json',
       'Authorization': 'key=' + self.authorizationKey,
     },