twitter-bootstrap-rails 4.0.0 with Rails 4

https://github.com/seyhunak/twitter-bootstrap-rails says: Twitter Bootstrap for Rails 5 and Rails 4 Asset Pipeline

but after bundle install I see this:

Bundler could not find compatible versions for gem "actionpack":
  In Gemfile:
    rails (= 4.1.7) was resolved to 4.1.7, which depends on
      actionpack (= 4.1.7)

    twitter-bootstrap-rails (~> 4.0.0) was resolved to 4.0.0, which depends on
      actionpack (>= 5.0.1, ~> 5.0)

Is it possible to make twitter-bootstrap-rails 4.0.0 worked with Rails 4.1.7?

• Cloned twitter-bootstrap-rails repo
• Analyzed latest commits
• Changed gemspecs
• ????
• PROFIT!!!