Ruby not found with open nebula-ruby.4.14.2-2

Hi , I’m running oracle RHat 6.5, upgrade it to ruby ver 2.3 , but when i try
to install opennebula packages, opennebula-ruby-4.14.2-2 , is asking me to install
ruby is needed by opennebula-ruby-4.14.2-2.x86_64

OpenNebula depends on ruby package. How do you upgrade ruby? Is it a package? Does it provide ruby?