diff --git a/config.ru b/config.ru
--- a/config.ru
+++ b/config.ru
@@ -1,4 +1,6 @@
 # This file is used by Rack-based servers to start the application.
 
-require ::File.expand_path('../config/environment',  __FILE__)
-run CafeGrader::Application
+require_relative "config/environment"
+
+run Rails.application
+Rails.application.load_server