config.ru in opal-jquery-0.4.6 vs config.ru in opal-jquery-0.5.0

@@ -1,8 +1,9 @@
 require 'bundler'
 Bundler.require
 
 require 'opal/rspec'
+require 'opal/rspec/sprockets_environment'
 
 sprockets_env = Opal::RSpec::SprocketsEnvironment.new
 run Opal::Server.new(sprockets: sprockets_env) { |s|
   s.main = 'opal/rspec/sprockets_runner'
   sprockets_env.add_spec_paths_to_sprockets