Gemfile in contentful_middleman-1.1.1 vs Gemfile in contentful_middleman-1.2.0

@@ -1,10 +1,10 @@
 # If you have OpenSSL installed, we recommend updating
 # the following line to use "https"
 source 'http://rubygems.org'
 
-gem "middleman-core", :github => "middleman/middleman", :branch => 'v3-stable'
+gem "middleman-core", '~> 3.4'
 
 # Specify your gem's dependencies in contentful_middleman.gemspec
 gemspec
 
 gem "rake"
@@ -13,6 +13,5 @@
 # Test tools
 gem "rspec"
 gem "simplecov"
 
 gem "cane", :platforms => [:mri_19, :mri_20], :require => false
-gem 'coveralls', :require => false