README.md in sickle-0.2.0 vs README.md in sickle-0.3.0

@@ -16,9 +16,13 @@
 * Support for namespaces
 * Support for command options and global options
 * Usage and help for free
 * No external dependencies (only stdlib optparse)
 
+#### Requirements
+
+* Ruby: 1.9.x, 2.0.x, jruby (1.9), rbx (1.9)
+
 
 ## Installation
 
 You are probably building command line tool that will be released as gem, just add that line to you gemspec.