Ruby 2.0.0 was released on February 24, 2013, on the 20th anniversary of Ruby's inception. Test out your apps and gems so you can be ready. You must install libyaml because Ruby 2.0.0 deprecated syck in favor of psych.
Make sure you have the latest RVM:
rvm get stable
Just run this in your favorite terminal after installing RVM:
# For Debian-based systems apt-get install libyaml-dev # For Fedora/CentOS/RHEL systems yum install libyaml-devel # For Mac with Homebrew brew install libyaml rvm pkg install openssl rvm install 2.0.0 \ --with-openssl-dir=$HOME/.rvm/usr \ --verify-downloads 1 rvm use 2.0.0