diff --git a/Gemfile b/Gemfile
index b34490ca..394fdd83 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,29 +1,29 @@
 source 'https://rubygems.org'
 
 # Build and doc tools
-gem 'rake',     '~> 10.0.3', :require => false
-gem 'yard',     '~> 0.8.0', :require => false
+gem 'rake', '~> 10.0.3', require: false
+gem 'yard', '~> 0.8.0', require: false
 
 # Test tools
 gem 'cucumber', '~> 1.3.1'
 gem 'fivemat'
-gem 'aruba',    '~> 0.5.1'
-gem 'rspec',    '~> 2.12'
+gem 'aruba', '~> 0.5.1'
+gem 'rspec', '~> 2.12'
 gem 'simplecov'
 
 # Optional middleman dependencies, included for tests
-gem 'haml', '~> 4.0.0', :require => false # Make sure to use Haml 4 for tests
-gem 'sinatra', :require => false
-gem 'slim', :require => false
-gem 'liquid', :require => false
-gem 'less', '~> 2.3.0', :require => false
-gem 'stylus', :require => false
-gem 'asciidoctor', :require => false
+gem 'haml', '~> 4.0.0', require: false # Make sure to use Haml 4 for tests
+gem 'sinatra', require: false
+gem 'slim', require: false
+gem 'liquid', require: false
+gem 'less', '~> 2.3.0', require: false
+gem 'stylus', require: false
+gem 'asciidoctor', require: false
 
 platforms :ruby do
   gem 'therubyracer'
   gem 'redcarpet', '~> 3.1'
-  gem 'pry', :require => false, :group => :development
+  gem 'pry', require: false, group: :development
 end
 
 platforms :jruby do
@@ -31,13 +31,13 @@ platforms :jruby do
 end
 
 # Code Quality
-gem 'cane', :platforms => [:mri_19, :mri_20], :require => false
-gem 'coveralls', :require => false
-gem 'rubocop', :require => false
+gem 'cane', platforms: [:mri_19, :mri_20], require: false
+gem 'coveralls', require: false
+gem 'rubocop', require: false, group: :development
 
 # Middleman itself
-gem 'middleman-core', :path => 'middleman-core'
-gem 'middleman-cli', :path => 'middleman-cli'
-gem 'middleman-templates', :path => 'middleman-templates'
-gem 'middleman-sprockets', :github => 'middleman/middleman-sprockets', :require => false
-gem 'middleman', :path => 'middleman'
+gem 'middleman-core', path: 'middleman-core'
+gem 'middleman-cli', path: 'middleman-cli'
+gem 'middleman-templates', path: 'middleman-templates'
+gem 'middleman-sprockets', github: 'middleman/middleman-sprockets', require: false
+gem 'middleman', path: 'middleman'