Updating from Rails 4.0 to 4.1 gives sass-rails railties version conflicts

Question

I\'m trying to update my Rails 4.0 app to 4.1. The app uses sass-rails, and when I try to update it using bundle update rails I get the following e

Answer 1

Updating bundler solved this for me:

gem install bundler

Apparently there was a bug in older bundlers.

Taken from related question: sass-rails requires sprockets 2.0.0 but rails 4.1.0 requires sprockets 2.12.1