README.md in direct7-0.0.17 vs README.md in direct7-0.0.18

@@ -6,10 +6,10 @@
 ## Installation
 The SDK is available on RubyGems and can be installed using two methods:
 Add this line to your application's Gemfile:
 
 ```bash
-gem 'direct7', '~> 0.0.17'
+gem 'direct7', '~> 0.0.18'
 ```
 
 And then execute:
 
 ```bash