When you run bundle install
, whatever is the latest version of bundler
installed locally will be used. Your Gemfile
dependencies will be installed
and the Gemfile.lock
will be marked at the bottom with a signature for the
version of bundler
that was used.
# Gemfile.lock
...
BUNDLED WITH
1.1.17
On future bundle install
calls, a matching major version of Bundler will be
used. If you'd like to migrate from 1.x.x to 2.x.x or vice versa, or even if
you want to explicitly change minor versions, you can run:
$ bundle update --bundler=2.2.4
This will bundle your project with 2.2.4
and update the BUNDLED WITH
section to reflect that.
Use the version that makes sense for you with the --bundler
flag.