I have been developing in Ruby on Rails since 2006 and can expertly upgrade your old Ruby on Rails applications to Rails 4.x and 5.x. I can even move your Windows hosted Rails 1.x and 2.x that depend on Ruby 1.8.6 to Linux based hosting and Ruby 1.8.7. Old, abandoned Ruby gems are not a hindrance to successfully porting your existing app to latest Rails versions.