--- a/config/application.rb	Sat Apr 14 04:19:29 2018 +0900
+++ b/config/application.rb	Sat Apr 14 04:19:52 2018 +0900
@@ -5,9 +5,14 @@
 
 require_relative "config_init"
 
+require "active_model/railtie"
+# require "active_job/railtie"
 require "active_record/railtie"
+# require "active_storage/engine"
 require "action_controller/railtie"
 # require "action_mailer/railtie"
+require "action_view/railtie"
+# require "action_cable/engine"
 require "sprockets/railtie"
 require "rails/test_unit/railtie"
 
@@ -58,5 +63,7 @@
     config.assets.initialize_on_precompile = false
 
     config.action_view.field_error_proc = proc { |html| html }
+
+    config.load_defaults 5.0
   end
 end