Update dependencies so we can bundle with Rails 4.1

activeadmin.gemspec

@@ -27,7 +27,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'jquery-rails'
   s.add_dependency 'jquery-ui-rails'
   s.add_dependency 'kaminari',            '~> 0.15'
-  s.add_dependency 'rails',               '>= 3.2', '< 4.1'
+  s.add_dependency 'rails',               '>= 3.2', '<= 4.1'
   s.add_dependency 'ransack',             '~> 1.0'
   s.add_dependency 'sass-rails'
 end