README.md in gnawrnip-0.6.0 vs README.md in gnawrnip-0.7.0

- old
+ new

@@ -14,10 +14,10 @@
 
 
 ## Requirements
 
 * Ruby
-    * `2.1.0` or higher
+    * `2.2.0` or higher
 * RubyGems
     * capybara `~> 2.1.0`
     * turnip_formatter
 
 ## Installation