README.md in mymoip-0.9.0 vs README.md in mymoip-0.10.0

@@ -19,9 +19,14 @@
 1. Open a pull request.
 2. Done.
 
 # Using
 
+## Compatibility
+
+* Ruby >= 1.9.3 - current version
+* Ruby 1.9.2 - 0.9.0
+
 ## First of all
 
 **Bundler - Gemfile**
 
 ```ruby