How to change Bundler default version

Question

bundler (2.0.1, default: 1.17.2)

How could I change the default to 2.0.1

Answer 1

What helped me is to delete the current default manually from the folder lib\ruby\gems\2.6.0\specifications\default\
and then install fresh bundler as usually
gem install bundler
or as default
gem install --default bundler

Answer 2

You need to remove .spec file to remove the gem.

Steps:

1. gem env – try to search in provided list under GEM PATHS, in specifications/default
2. remove there bundler-VERSION.gemspec
3. install bundler, if you don't have specific: gem install bundler:VERSION --default

Answer 3

Following https://bundler.io/guides/bundler_2_upgrade.html#upgrading-applications-from-bundler-1-to-bundler-2, here's what worked for me:

gem install --default bundler
gem update --system
bundler update --bundler