Extended maintenance of Ruby versions 1.8.7 and 1.9.2 ended on July 31, 2014. Read more
# File rubygems/commands/outdated_command.rb, line 18 def execute locals = Gem::SourceIndex.from_installed_gems locals.outdated.sort.each do |name| local = locals.find_name(name).last dep = Gem::Dependency.new local.name, ">= #{local.version}" remotes = Gem::SpecFetcher.fetcher.fetch dep remote = remotes.last.first say "#{local.name} (#{local.version} < #{remote.version})" end end