title: How do I use the correct version of Ruby?
body: <p>I've already run <code>bundle</code>.</p>
  
  <pre><code>C:\Users\Chloe\workspace&gt;rails -v
  Your Ruby version is 2.3.1, but your Gemfile specified ~&gt; 2.4.0
  
  C:\Users\Chloe\workspace&gt;ruby -v
  ruby 2.4.2p198 (2017-09-14 revision 59899) [x64-mingw32]
  
  C:\Users\Chloe\workspace&gt;path
  PATH=C:\ruby24\bin;...
  </code></pre>