$ gem update --system
$ gem install bundler
$ bundle update --bundler
$ gem update --system 3.7.2
$ gem install bundler -v 2.7.2
$ bundle update --bundler=2.7.2
$ gem update --system --pre
$ gem install bundler --pre
$ bundle update --bundler=4.0.0.beta1
- Download from: https://rubygems.org/pages/download
- Unpack into a directory and
cdthere - Install with:
ruby setup.rb