capistrano-nginx-unit.gemspec in capistrano-nginx-unit-0.1 vs capistrano-nginx-unit.gemspec in capistrano-nginx-unit-0.2

@@ -16,7 +16,9 @@
 
   spec.files         = `git ls-files -z`.split("\x0").reject do |f|
     f.match(%r{^(test|spec|features)/})
   end
 
+  spec.required_ruby_version = '~> 2.0'
+
   spec.add_runtime_dependency "capistrano", "~> 3.0"
 end