README.markdown in riddle-2.1.0 vs README.markdown in riddle-2.2.0

- old
+ new

@@ -12,10 +12,10 @@
 
     gem install riddle
 
 Or include it in a Gemfile:
 
-    gem 'riddle', '~> 2.1.0'
+    gem 'riddle', '~> 2.2.0'
 
 ## Usage
 
 As of version 1.0.0, Riddle supports multiple versions of Sphinx in the one gem - you'll need to require your specific version after a normal require, though. The latest distinct version is `2.1.0`: