rbenv ruby 2.0.0 and byebug debugger

Hello. I have a problem with installing byebug debugger under ruby 2.0.0 (this is customer's requirements and can't be changed). I am using OS X 10.9.5. I installed rbenv according to manual, using homebrew, and everything worked fine so far. I can easily develop apps and no other gem gives me any issues. Yet, when I try to install byebug it ends with error

$ gem install byebug
ERROR:  Error installing byebug:
byebug requires Ruby version >= 2.0.0.

Now, my ruby version is:

$ rbenv global
2.0.0-rc2

And my all ruby 2.0.0 versions are as follows:

$ rbenv install -l | grep 2.0.0
2.0.0-dev
2.0.0-preview1
2.0.0-preview2
2.0.0-rc1
2.0.0-rc2
2.0.0-p0
2.0.0-p195
2.0.0-p247
2.0.0-p353
2.0.0-p451
2.0.0-p481
2.0.0-p576
maglev-2.0.0-dev
rbx-2.0.0-dev
rbx-2.0.0-rc1
rbx-2.0.0

My question is, which is the most recent 2.0.0 and which one should I choose to have byebug gem working properly? Thanks for all help.