$ bundle update
Traceback (most recent call last):
2: from /home/zunda/.rbenv/versions/2.5.5/bin/bundle:23:in `<main>'
1: from /home/zunda/.rbenv/versions/2.5.5/lib/ruby/2.5.0/rubygems.rb:303:in `activate_bin_path'
/home/zunda/.rbenv/versions/2.5.5/lib/ruby/2.5.0/rubygems.rb:284:in `find_spec_for_exe': Could not find 'bundler' (1.17.3) required by your /home/zunda/src/github.com/heroku/jp/Gemfile.lock. (Gem::GemNotFoundException)
To update to the latest version installed on your system, run `bundle update --bundler`.
To install the missing version, run `gem install bundler:1.17.3`
あとひといきーwwww