README.md in postmark-rails-0.14.0 vs README.md in postmark-rails-0.15.0

@@ -15,10 +15,10 @@
 ## Configuring your Rails application
 
 Add this to your Gemfile: (change version numbers if needed)
 
 ``` ruby
-gem 'postmark-rails', '~> 0.14.0'
+gem 'postmark-rails', '~> 0.15.0'
 ```
 
 Don’t forget to run `bundle install` command every time you change something in the Gemfile.
 
 Add this to your config/application.rb: