README.md in action_policy-0.3.0.beta1 vs README.md in action_policy-0.3.0

@@ -19,10 +19,10 @@
 ## Installation
 
 Add this line to your application's `Gemfile`:
 
 ```ruby
-gem "action_policy"
+gem "action_policy", "~> 0.3.0"
 ```
 
 And then execute:
 
     $ bundle