Rakefile in rails_best_practices-0.2.10 vs Rakefile in rails_best_practices-0.2.11

@@ -25,9 +25,9 @@
   gemspec.summary = "check rails files according to ihower's presentation 'rails best practices'"
   gemspec.description = "check rails files according to ihower's presentation 'rails best practices'"
   gemspec.email = "[e-mail]"
   gemspec.homepage = "http://github.com/flyerhzm/rails_best_practices"
   gemspec.authors = ["Richard Huang"]
-  gemspec.add_dependency 'ruby_parser'
-  gemspec.add_dependency 'ruby2ruby'
+  gemspec.add_dependency 'ruby_parser', '>= 2.0.4'
+  gemspec.add_dependency 'ruby2ruby', '>= 1.2.4'
 end
 Jeweler::GemcutterTasks.new