README.md in mailkick-0.1.1 vs README.md in mailkick-0.1.2

@@ -112,10 +112,18 @@
 gem 'gibbon'
 ```
 
 Be sure `ENV["MAILCHIMP_API_KEY"]` and `ENV["MAILCHIMP_LIST_ID"]` are set.
 
+#### Mailgun
+
+```ruby
+gem 'mailgun-ruby'
+```
+
+Be sure `ENV["MAILGUN_API_KEY"]` is set.
+
 #### Other
 
 Will gladly accept pull requests.
 
 ### Advanced
@@ -137,10 +145,10 @@
 
 ```ruby
 class UserMailer < ActionMailer::Base
 
   def order_reminder(user)
-    header[:mailkick_list] = "order_reminders"
+    headers[:mailkick_list] = "order_reminders"
     # ...
   end
 
 end
 ```