Run An Older Version Of Bundler

You can check your current version of bundler like so:

$ bundle --version
1.17.3

If you have older versions of bundler, you run against those by specifying the version in the command:

$ bundle _1.16.6_ --version
1.16.6

Likewise this can be used with any bundler command:

$ bundle _1.16.6_ install

source