title: Bundler could not find compatible versions for gem "bundler": In Gemfile:
body: <p>I'm making GitHub blog page with Jekyll. I've failed like numerous times and just forked new one and followed README on the repository.</p>
  <p>It's <a href="https://github.com/janczizikow/sleek/blob/master/README.md" rel="nofollow noreferrer">https://github.com/janczizikow/sleek/blob/master/README.md</a>
  and I tried to run  inside the directory(master) but this msg keeps coming out.</p>
  <p>I tried 'gem install bundler' 'gem cleanup' and similar solutions on the internet but still can't fix it. I get that I need another version which is lower one, then how can I remove the current one and install the version I need?</p>
  <p>I've never used Ruby so I'm SO lost. A little advice will mean a lot.</p>
  <pre><code>bundle install
  Fetching gem metadata from https://rubygems.org/...........
  Fetching gem metadata from https://rubygems.org/.
  Resolving dependencies...
  Bundler could not find compatible versions for gem &quot;bundler&quot;:
    In Gemfile:
      bundler (~&gt; 1.12) x64-mingw32
  
    Current Bundler version:
      bundler (2.0.2)
  This Gemfile requires a different version of Bundler.
  Perhaps you need to update Bundler by running `gem install bundler`?
  
  Could not find gem 'bundler (~&gt; 1.12)' in any of the relevant sources:
    the local ruby installation
  </code></pre>