README.md in action_policy-0.5.5 vs README.md in action_policy-0.5.6

@@ -29,10 +29,10 @@
 ## Installation
 
 Add this line to your application's `Gemfile`:
 
 ```ruby
-gem "action_policy", "~> 0.4.0"
+gem "action_policy"
 ```
 
 And then execute:
 
 ```sh