Gemfile in rubydns-2.0.0 vs Gemfile in rubydns-2.0.1

@@ -2,9 +2,10 @@
 
 gemspec
 
 group :development do
 	gem "process-daemon"
+	gem "nio4r", "~> 1.0"
 end
 
 group :test do
 	gem 'simplecov'
 	gem 'coveralls', require: false