henkei.gemspec in henkei-1.23.0 vs henkei.gemspec in henkei-1.23.1

@@ -23,9 +23,10 @@
 
   spec.add_runtime_dependency 'json', '>= 1.8', '< 3'
   spec.add_runtime_dependency 'mime-types', '>= 1.23', '< 4'
 
   spec.add_development_dependency 'bundler', '~> 2.0'
+  spec.add_development_dependency 'rails', '~> 5.0'
   spec.add_development_dependency 'rake', '~> 12.3'
   spec.add_development_dependency 'rspec', '~> 3.7'
   spec.add_development_dependency 'rubocop', '~> 0.71'
   spec.add_development_dependency 'simplecov', '~> 0.15'
 end