Init Error

Got this error, any ideas?

```
~/.rvm/gems/ruby-1.9.2-p320/gems/berkshelf-1.4.0/lib/berkshelf/init_generator.rb:155:in `assert_default_supported': undefined method `find_by_name' for Gem::Specification:Class (NoMethodError)
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/berkshelf-1.4.0/lib/berkshelf/init_generator.rb:129:in `check_option_support'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/berkshelf-1.4.0/lib/berkshelf/init_generator.rb:54:in `generate'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/thor-0.18.1/lib/thor/command.rb:27:in `run'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/thor-0.18.1/lib/thor/invocation.rb:120:in `invoke_command'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/thor-0.18.1/lib/thor/invocation.rb:127:in `block in invoke_all'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/thor-0.18.1/lib/thor/invocation.rb:127:in `each'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/thor-0.18.1/lib/thor/invocation.rb:127:in `map'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/thor-0.18.1/lib/thor/invocation.rb:127:in `invoke_all'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/berkshelf-1.4.0/lib/berkshelf/cli.rb:307:in `init'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/thor-0.18.1/lib/thor/command.rb:27:in `run'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/thor-0.18.1/lib/thor/invocation.rb:120:in `invoke_command'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/thor-0.18.1/lib/thor.rb:363:in `dispatch'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/berkshelf-1.4.0/lib/berkshelf/cli.rb:17:in `dispatch'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/thor-0.18.1/lib/thor/base.rb:439:in `start'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/gems/berkshelf-1.4.0/bin/berks:6:in `<top (required)>'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/bin/berks:19:in `load'
	from /home/kbacha/.rvm/gems/ruby-1.9.2-p320/bin/berks:19:in `<main>'
```