Gemfile in bootstrap_leather-0.9.3 vs Gemfile in bootstrap_leather-0.9.4

@@ -1,9 +1,9 @@
 source 'http://rubygems.org'
 # Add dependencies required to use your gem here.
 # Example:
 #   gem 'activesupport', '>= 2.3.5'
 
-gem 'bootstrap-sass', '~> 3'
-gem 'rails', '>= 4'
+gem 'bootstrap-sass', '>= 3.1', '< 4'
+gem 'rails', '>= 4', '< 6'
 gem 'haml', '~> 4'
 gem 'jeweler', '~> 2'
\ No newline at end of file