Rakefile in pupil-0.1.1 vs Rakefile in pupil-0.1.2

@@ -19,9 +19,10 @@
   gem.license = "MIT"
   gem.summary = %Q{The "Lazy" Twitter API Library for Ruby 1.9.x}
   gem.description = %Q{The "Lazy" Twitter API Library for Ruby 1.9.x. Easy to use.}
   gem.email = "[e-mail]"
   gem.authors = ["Oame"]
+  gem.required_ruby_version = '~>1.9.0'
   # dependencies defined in Gemfile
 end
 Jeweler::RubygemsDotOrgTasks.new
 
 require "rspec/core"