diff --git a/CHANGELOG.md b/CHANGELOG.md
index 04f16c6..fab48b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## 4.0.2 - 2016-07-09
+- Check for null parameters, mainly applies to startScan which doesn't necessarily require parameters
+- Don't try to stop scan if already stopped
+
+## 4.0.1 - 2016-04-17
+- Minor fixes to support npm
+
 ## 4.0.0 - 2016-03-30
 - Merged server side functions
 
@@ -17,5 +24,4 @@
 - Sync Angular wrapper's and Cordova plugin's version numbers
 - Timeouts available on most functions
 - Example updated with queueing example
-- Removed build generation. App build process can handle minification.
-
+- Removed build generation. App build process can handle minification
\ No newline at end of file
diff --git a/bower.json b/bower.json
index f718dfd..314ac08 100755
--- a/bower.json
+++ b/bower.json
@@ -1,7 +1,7 @@
 {
   "name": "ng-cordova-bluetoothle",
   "main": "./ng-cordova-bluetoothle.js",
-  "version": "4.0.0",
+  "version": "4.0.2",
   "description": "AngularJS Wrapper for Phonegap / Cordova Bluetooth LE Plugin",
   "authors": [
     "George Stocker <http://georgestocker.com>",
diff --git a/ng-cordova-bluetoothle.js b/ng-cordova-bluetoothle.js
index 2ee1726..d493ac5 100644
--- a/ng-cordova-bluetoothle.js
+++ b/ng-cordova-bluetoothle.js
@@ -59,7 +59,7 @@ angular.module('ngCordovaBluetoothLE', []).factory('$cordovaBluetoothLE', ['$q',
       q.reject(errorUnsupported);
     } else {
       var timeout = null;
-      if (params.scanTimeout) {
+      if (params && params.scanTimeout) {
         timeout = $timeout(function() {
           window.bluetoothle.isScanning(function(obj) {
             if (obj.isScanning) {
@@ -136,7 +136,7 @@ angular.module('ngCordovaBluetoothLE', []).factory('$cordovaBluetoothLE', ['$q',
       window.bluetoothle.connect(
         function(obj) {
           $timeout.cancel(timeout);
-          if (params.useResolve) {
+          if (params && params.useResolve) {
             q.resolve(obj);
           } else {
             q.notify(obj);
@@ -162,7 +162,7 @@ angular.module('ngCordovaBluetoothLE', []).factory('$cordovaBluetoothLE', ['$q',
       window.bluetoothle.reconnect(
         function(obj) {
           $timeout.cancel(timeout);
-          if (params.useResolve) {
+          if (params && params.useResolve) {
             q.resolve(obj);
           } else {
             q.notify(obj);
@@ -336,7 +336,7 @@ angular.module('ngCordovaBluetoothLE', []).factory('$cordovaBluetoothLE', ['$q',
           $timeout.cancel(timeout);
           q.notify(obj);
 
-          if (params.subscribeTimeout && obj.status == "subscribed") {
+          if (params && params.subscribeTimeout && obj.status == "subscribed") {
             $timeout(function() {
               window.bluetoothle.unsubscribe(
                 function(obj) {
@@ -898,7 +898,7 @@ angular.module('ngCordovaBluetoothLE', []).factory('$cordovaBluetoothLE', ['$q',
   };
 
   var createTimeout = function(params, q) {
-    if (params.timeout) {
+    if (params && params.timeout) {
       return $timeout(function() {
         params.error = "timeout";
         q.reject(params);
diff --git a/package.json b/package.json
index 70fcf18..2344e72 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ng-cordova-bluetoothle",
-  "version": "4.0.1",
+  "version": "4.0.2",
   "description": "AngularJS Wrapper for Phonegap / Cordova Bluetooth LE Plugin",
   "author": {
     "name": "George Stocker",