Update railties

Author: Nitr

grape-swagger-rails.gemspec

@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency 'bundler', '~> 1.3'
   spec.add_development_dependency 'rake'
-  spec.add_dependency 'railties', '~> 3.2.12'
+  spec.add_dependency 'railties', '>= 3.2.12'
   spec.add_dependency 'rubyzip', '~> 0.9.9'
   spec.add_dependency 'grape-swagger', '~> 0.5.0'
 end