Gemfile in bootstrap_leather-0.4.9 vs Gemfile in bootstrap_leather-0.5.0

@@ -1,10 +1,10 @@
 source 'http://rubygems.org'
 # Add dependencies required to use your gem here.
 # Example:
 #   gem 'activesupport', '>= 2.3.5'
 
-gem 'bootstrap-sass'
+gem 'bootstrap-sass', '~> 3.3'
 gem 'rails', '>= 4.1'
 gem 'haml'
 
 gemspec
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