language: ruby
rvm:
  - 2.1.10
  - 2.3.1
script:
  - bundle exec rake spec
before_install: gem install bundler

language: ruby
rvm:
  - 2.1.10
  - 2.3.1
script:
  - bundle exec rake spec
before_install: gem install bundler -v 1.17.3

Fix last supported version of bundler
Fix last supported version of bundler
