Trying to install ActiveAdmin on a Rails 4 project, and am getting this error:
Bundler could not find compatible versions for gem "activerecord":
  In Gemfile:
    activeadmin (>= 0) ruby depends on
      activerecord (~> 3.0) ruby
    rails (= 4.0.0) ruby depends on
      activerecord (4.0.0)
I've followed this example: Active admin install with Rails 4 and added activeadmin to the gemfile like so:
gem 'activeadmin', github: 'gregbell/active_admin', branch: 'rails4'
But still no go; same error.
 
     
     
    