Heroku错误无法登录

Question

我正在使用带有10.5.8豹的mac 在安装了Heroku Toolbelt之后，我在终端输入命令Heroku，但我最终收到了这条消息：

> /usr/local/heroku/vendor/gems/heroku-api-0.2.13/lib/heroku/api.rb:3:in `require': no such file to load -- securerandom (LoadError)
    from /usr/local/heroku/vendor/gems/heroku-api-0.2.13/lib/heroku/api.rb:3
    from /usr/local/heroku/vendor/gems/heroku-api-0.2.13/lib/heroku-api.rb:1:in `require'
    from /usr/local/heroku/vendor/gems/heroku-api-0.2.13/lib/heroku-api.rb:1
    from /usr/local/heroku/lib/heroku/cli.rb:7:in `require'
    from /usr/local/heroku/lib/heroku/cli.rb:7
    from /usr/bin/heroku:22:in `require'
    from /usr/bin/heroku:22