diff --git a/example/NotifService.js b/example/NotifService.js
index 086f59d80..5d7cba295 100644
--- a/example/NotifService.js
+++ b/example/NotifService.js
@@ -59,8 +59,8 @@ export default class NotifService {
 
       /* iOS only properties */
       alertAction: 'view', // (optional) default: view
-      category: null, // (optional) default: null
-      userInfo: null, // (optional) default: null (object containing additional notification data)
+      category: '', // (optional) default: empty string
+      userInfo: {}, // (optional) default: {} (using null throws a JSON value '<null>' error)
 
       /* iOS and Android properties */
       title: "Local Notification", // (optional)
@@ -116,4 +116,4 @@ export default class NotifService {
   cancelAll() {
     PushNotification.cancelAllLocalNotifications();
   }
-}
\ No newline at end of file
+}