gem update --system

1 job for master in 40 seconds
Status Job ID Name Coverage
  Deploy
failed #183175
pages

00:00:40

 
Name Stage Failure
failed
pages Deploy
	/usr/local/bin/bundle

RubyGems system software updated
$ gem install bundler
Successfully installed bundler-2.1.4
1 gem installed
$ bundle install
You must use Bundler 2 or greater with this lockfile.
ERROR: Job failed: exit code 1