从cloud9托管heroku

我正在尝试创建一个新的应用程序,然后将我的应用程序推送到heroku但任何时候我键入heroku create出现以下错误。 任何帮助,将不胜感激。

 /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/site_ruby/2.3.0/rubygems/dependency.rb:308:in `to_specs': Could not find 'heroku' (>= 0.a) among 392 total gem(s) (Gem::MissingSpecError) Checked in 'GEM_PATH=/usr/local/rvm/gems/ruby-2.3.0:/usr/local/rvm/gems/ruby-2.3.0@global', execute `gem env` for more information from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/site_ruby/2.3.0/rubygems/dependency.rb:320:in `to_spec' from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_gem.rb:65:in `gem' from /usr/local/rvm/gems/ruby-2.3.0/bin/heroku:22:in `' from /usr/local/rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in `eval' from /usr/local/rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in `'