How to remove/uninstall an old version of a gem
bundler, ruby-on-rails, rubygems, twitter-bootstrap
Solution
You can remove a specific version of a gem by using:
gem uninstall gem_name --version version
To remove `bootstrap-sass 2.0.1` use:
gem uninstall bootstrap-sass --version 2.0.1
Alternately, you could tell bundler to use a particular version, as others have suggested. In your Gemfile to use ONLY version 2.0.2:
gem 'bootstrap-sass', '2.0.2'
Or
gem 'bootstrap-sass', '~> 2.0.2'
will use the greatest version higher than 2.0.2 but less than 2.1.
See "Specifying Versions in a Gemfile" for more information.
Problem
I updated a gem while I had the Rails server running and now I have two versions of the gem installed in my gemset. I updated using `bundle update bootstrap-sass` and now have both `2.0.1` and `2.0.2`. The server seems to be serving up the 2.0.2 version so I assume it should have removed the 2.0.1 version when it did the update and didn't because the gem was in use at the time. How can I update it properly so that the server will use 2.0.2 instead of 2.0.1, or how do I remove the 2.0.1 version of the gem?