Gemfile in red_amber-0.1.7 vs Gemfile in red_amber-0.1.8

@@ -16,9 +16,10 @@
   gem 'rubocop-rubycw', require: false
 
   gem 'iruby'
   gem 'test-unit'
   gem 'webrick'
+  gem 'yard'
 
   gem 'benchmark_driver'
   gem 'red-datasets'
 end