Using multiple Bundler versions

Try this:

1) gem install bundler -v 1.17.1

2) bundle _1.17.1_ install

You can specify multiple bundler versions by using underscores: RubyGems already provides this functionality. Specify the version number in underscores as the first argument on the command line.

$ bundle _1.1.3_ --version
Bundler version 1.1.3
$ bundle _1.1.0_ --version
Bundler version 1.1.0
$ bundle _1.0.22_ --version
Bundler version 1.0.22

There's an issue in rbenv with a similar question: https://github.com/rbenv/rbenv/issues/235.

Hope this helps