Vagrantにberkshelf入れたらエラー吐いた

※調べたらberkshelf自体が今は非推奨らしいのでお気をつけて。
https://sethvargo.com/the-future-of-vagrant-berkshelf/

Vagrantの起動しようとしたら・・・

$ vagrant up

Bringing machine 'default' up with 'virtualbox' provider...

/Users/user/.vagrant.d/gems/gems/vagrant-berkshelf-1.3.7/lib/berkshelf/vagrant/env.rb:18:in `initialize': undefined method `scope' for #<Vagrant::UI::Colored:0x00000107c07a30> (NoMethodError)

from /Users/user/.vagrant.d/gems/gems/vagrant-berkshelf-1.3.7/lib/berkshelf/vagrant/action.rb:54:in `new'

from /Users/user/.vagrant.d/gems/gems/vagrant-berkshelf-1.3.7/lib/berkshelf/vagrant/action.rb:54:in `block in setup'

from /Users/user/.vagrant.d/gems/gems/vagrant-berkshelf-1.3.7/lib/berkshelf/vagrant/action.rb:53:in `tap'

from /Users/user/.vagrant.d/gems/gems/vagrant-berkshelf-1.3.7/lib/berkshelf/vagrant/action.rb:53:in `setup'

from /Users/user/.vagrant.d/gems/gems/vagrant-berkshelf-1.3.7/lib/berkshelf/vagrant/plugin.rb:15:in `provision'

from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.4/lib/vagrant/action/runner.rb:45:in `call'

from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.4/lib/vagrant/action/runner.rb:45:in `block (2 levels) in run'

from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.4/lib/vagrant/action/runner.rb:44:in `tap'

from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.4/lib/vagrant/action/runner.rb:44:in `block in run'

from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.4/lib/vagrant/action/runner.rb:43:in `map'

from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.4/lib/vagrant/action/runner.rb:43:in `run'

from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.4/lib/vagrant/machine.rb:157:in `action'

from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.4/lib/vagrant/batch_action.rb:72:in `block (2 levels) in run'

from /Users/kuma/.vagrant.d/gems/gems/logging-1.8.2/lib/logging/diagnostic_context.rb:323:in `call'

from /Users/kuma/.vagrant.d/gems/gems/logging-1.8.2/lib/logging/diagnostic_context.rb:323:in `block in create_with_logging_context'

何かエラー吐いた。。。
プラグインのberkshelfのバージョンが古い模様。。。

アンインストールして新しいの入れたげる。

$ vagrant plugin uninstall berkshelf

$ vagrant plugin install vagrant-berkshelf --plugin-version=2.0.1

以上！