Gemfile in bootstrap_leather-0.8.8 vs Gemfile in bootstrap_leather-0.9.0

@@ -2,8 +2,8 @@
 # Add dependencies required to use your gem here.
 # Example:
 #   gem 'activesupport', '>= 2.3.5'
 
 gem 'bootstrap-sass', '~> 3'
-gem 'rails', '~> 4'
+gem 'rails', '>= 4'
 gem 'haml', '~> 4'
 gem 'jeweler', '~> 2'
\ No newline at end of file