To upgrade from Rubygems v1.5.1 that comes with jRuby 1.6.0 simply do the following:

gem install rubygems-update -v 1.5.2
update_rubygems

Once you are on Rubygems 1.5.2 then you can update using:

gem update --system -v 1.x.x

If you need to downgrade:

gem install rubygems-update -v 1.5.1
gem uninstall rubygems-update -v 1.5.2
update_rubygems

Leave a Reply