diff --git a/lib/pushnotificationsservice.js b/lib/pushnotificationsservice.js
index 3c8990e..4286c37 100644
--- a/lib/pushnotificationsservice.js
+++ b/lib/pushnotificationsservice.js
@@ -60,6 +60,10 @@ PushNotificationsService.prototype.start = function(opts, cb) {
   self.defaultUnit = opts.pushNotificationsOpts.defaultUnit || 'btc';
   self.subjectPrefix = opts.pushNotificationsOpts.subjectPrefix || '';
   self.pushServerUrl = opts.pushNotificationsOpts.pushServerUrl;
+  self.authorizationKey = opts.pushNotificationsOpts.authorizationKey;
+
+  if (!self.authorizationKey) return cb(new Error('Missing authorizationKey attribute in configuration.'));
+
   async.parallel([
 
     function(done) {
@@ -117,28 +121,30 @@ PushNotificationsService.prototype._sendPushNotifications = function(notificatio
         },
         function(contents, next) {
           async.map(recipientsList, function(recipient, next) {
-            var opts = {};
             var content = contents[recipient.language];
-            opts.users = [notification.walletId + '$' + recipient.copayerId];
-            opts.android = {
-              "data": {
-                "title": content.plain.subject,
-                "message": content.plain.body,
-                "walletId": sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(notification.walletId)),
-                "notId": Math.floor(Math.random() * 100000) + 1
-              }
-            };
-            opts.ios = {
-              "alert": {
-                "title": content.plain.subject,
-                "body": content.plain.body
-              },
-              "sound": "default",
-              "payload": {
-                "walletId": sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(notification.walletId))
-              }
-            };
-            return next(err, opts);
+
+            self.storage.fetchPushNotificationSubs(recipient.copayerId, function(err, subs) {
+              if (err) return next(err);
+
+              var opts = _.map(subs, function(sub) {
+                return {
+                  to: sub.token,
+                  priority: 'high',
+                  restricted_package_name: sub.packageName,
+                  notification: {
+                    title: content.plain.subject,
+                    body: content.plain.body,
+                    sound: "default",
+                    click_action: "FCM_PLUGIN_ACTIVITY",
+                    icon: "fcm_push_icon",
+                  },
+                  data: {
+                    "walletId": sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(notification.walletId)),
+                  },
+                };
+              });
+              return next(err, opts);
+            });
           }, next);
         },
         function(optsList, next) {
@@ -356,14 +362,16 @@ PushNotificationsService.prototype._compileTemplate = function(template, extensi
 PushNotificationsService.prototype._makeRequest = function(opts, cb) {
   var self = this;
 
-  self.request({
+  request({
     url: self.pushServerUrl + '/send',
     method: 'POST',
     json: true,
+    header: {
+      'Content-Type': 'application/json',
+      'Authorization': 'key=' + self.authorizationKey,
+    },
     body: opts
-  }, function(err, response) {
-    return cb(err, response);
-  });
+  }, cb);
 };
 
 module.exports = PushNotificationsService;