README.md in intercom-3.5.2 vs README.md in intercom-3.5.3

@@ -1,10 +1,10 @@
 # intercom-ruby
 
-Ruby bindings for the Intercom API (https://api.intercom.io).
+Ruby bindings for the Intercom API (https://developers.intercom.io/reference).
 
-[API Documentation](https://api.intercom.io/docs)
+[API Documentation](https://developers.intercom.io/docs)
 
 [Gem Documentation](http://rubydoc.info/github/intercom/intercom-ruby/master/frames)
 
 For generating Intercom javascript script tags for Rails, please see https://github.com/intercom/intercom-rails
 
@@ -20,11 +20,11 @@
 
     gem install intercom
 
 Using bundler:
 
-    gem 'intercom', "~> 3.5.1"
+    gem 'intercom', "~> 3.5.2"
 
 ## Basic Usage
 
 ### Configure your client
 
@@ -238,10 +238,10 @@
     :type => 'admin',
     :id   => "1234"
   },
   :to => {
     :type => "user",
-    :id   => "5678"
+    :user_id   => "5678"
   }
 })
 
 # Email message from admin to user
 intercom.messages.create({