Recieve message: 'Capistrano 3 is not yet supported'

[astery]

I'm following this for rails 3 section in order to include cap tasks. Then I run bin/cap staging dump:remote:create, I recieve message:

(Backtrace restricted to imported tasks)
cap aborted!
Capistrano 3 is not yet supported

Tasks: TOP => staging
(See full trace by running task with --trace)

Environment: rails 4.2.0, ruby 2.0.0p598, capistrano 3.3.5, dump 1.1.0

Is this tasks are not supposed to use with rails 4.2?

[toy]

Gem currently supports only capistrano 2. Its capistrano tasks use a lot of methods that disappeared/changed completely in capistrano 3. I thought about supporting new version, but currently I am really short on time.

[toy]

Otherwise it works on rails 4.2.