ponytail.gemspec in ponytail-0.0.1 vs ponytail.gemspec in ponytail-0.0.2

@@ -16,10 +16,10 @@
   spec.files         = `git ls-files`.split($/)
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.add_dependency 'rails'
+  spec.add_dependency 'rails', '~> 4.0'
 
   spec.add_development_dependency "bundler", "~> 1.3"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec"
 end