source "https://rubygems.org" gemspec if RbConfig::CONFIG['RUBY_PROGRAM_VERSION'] && RbConfig::CONFIG['RUBY_PROGRAM_VERSION'] >= '1.9.3' gem 'activemodel', '>= 3.2.0' gem 'activesupport', '>= 3.2.0' else gem 'activemodel', '>= 3.2.0' gem 'activesupport', '>= 3.2.0' end