Gemfile in rouge-2.1.0 vs Gemfile in rouge-2.1.1

@@ -3,19 +3,23 @@
 gemspec
 
 gem 'minitest', '~> 4.0'
 gem 'wrong'
 
+gem 'rubocop', '~> 0.49.1' if RUBY_VERSION >= '2.0.0'
+
 gem 'rake'
 
 # don't try to install redcarpet under jruby
 gem 'redcarpet', :platforms => :ruby
 
-gem 'pry'
+group :development do
+  gem 'pry'
 
-# docs
-gem 'yard'
-gem 'github-markup'
+  # docs
+  gem 'yard'
+  gem 'github-markup'
 
-# for visual tests
-gem 'sinatra'
-gem 'shotgun'
+  # for visual tests
+  gem 'sinatra'
+  gem 'shotgun'
+end