README.markdown in roar-1.1.0 vs README.markdown in roar-1.1.1

@@ -65,9 +65,15 @@
 
 ```ruby
 gem 'roar'
 ```
 
+To use roar with Ruby versions < 2.2.0, add a version pin to your Gemfile:
+
+```ruby
+gem 'sinatra', '~> 1.4'
+```
+
 ### Dependencies
 
 Roar does not bundle dependencies for JSON and XML.
 
 If you want to use JSON, add the following to your `Gemfile`: