title: Ruby -v showing the wrong version
body: <p>I installed Ruby with homebrew <a href="https://gorails.com/setup/osx/10.11-el-capitan" rel="nofollow noreferrer">following these steps</a> </p>
  
  <p>everything was great but then I found out the developer i'm working with used Ruby 2.3.0 and when I try to run rails server to get started, it complains about that whole move from Big Int to Integer .</p>
  
  <p>So after some research and the  <a href="https://stackoverflow.com/questions/41903202/ruby-on-rails-rails-server-exits-immediately-after-starting-systemstackerror">link</a> it indeed seems the right approach is to use 2.3 (wish the developer told me that initially).</p>
  
  <p>I installed 2.3.0, but when I type ruby -v it still shows up as 2.4. I even used rbenv uninstall but it still says 2.4.</p>
  
  <p>I'm still learning the basics so was hoping someone could maybe point me in the right direction on how to get it to register as 2.3 instead.</p>
  
  <p>Thanks so much!</p>