It is not going to work in Rails 5.

[railsjack]

Could you all please fix these files so that we can use Rails 5.0+ ?

Gemfile
app/controllers/twilio_controller.rb
test/controllers/twilio_controller_test.rb

I have already fixed them on my local, but I want to you all to check if mine is right.
Or if you update the files above, then I can compare them to my codes.