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

@@ -7,10 +7,10 @@
 ## Installation
 
 Add this line to your application's Gemfile:
 
 ```ruby
-gem 'paykassa'
+gem 'paykassa', '~> 0.1.1'
 ```
 
 And then execute:
 
     $ bundle install