language: ruby
cache: bundler
sudo: false
rvm:
  - 1.9.3
  - 2.0.0-p648
  - 2.1.10
  - 2.2.5
  - 2.3.1

language: ruby
cache: bundler
sudo: false
rvm:
  - 1.9.3
  - 2.0.0-p648
  - 2.1.10
  - 2.2.5
  - 2.3.1
before_install:
  - gem install bundler -v 1.16.1

Fix running CI on Ruby 2.3.1
[ci] Fix running CI on Ruby 2.3.1
