rvm:
  - 1.9.3
  - 2.0.0
  - 2.1.0
  - 2.2.0
  - 2.3.0
  - rbx

before_install:
  - gem update bundler
rvm:
  - 1.9.3
  - 2.0.0
  - 2.1.0
  - 2.2.0
  - 2.3.0
  - rbx

Update bundler before bundle install
Update bundler before bundle install