Incompatible json gem versions in Rails when installing Stripe

Question

I´m trying to install Stripe gem in my Rails 4.0 app, but when running bundle install I´m getting this error:

Bundler could not find compatible versions for gem "json":
  In snapshot (Gemfile.lock):
    json (1.8.0)

  In Gemfile:
    stripe (>= 0) x86-mingw32 depends on
      json (~> 1.8.1) x86-mingw32

I added this entry to my gemfile:

# stripe
gem 'stripe', :git => 'https://github.com/stripe/stripe-ruby'

and I do confirm my gemfile.lock has this entry:

json (1.8.0)

How can I upgrade it? I´m not so skilled with this config files.

Answer 1

Solved.

You have just to run:

 bundle update json