.travis.yml in chef-vault-2.7.1 vs .travis.yml in chef-vault-2.8.0.rc1

@@ -1,13 +1,15 @@
 language: ruby
 branches:
   only:
     - master
 rvm:
+  - "1.9.3-p551"
   - "2.0.0-p647"
   - "2.1.6"
   - "2.2.2"
 install: bundle install --binstubs
+before_install: gem install bundler
 env: TRAVIS_BUILD=true
 notifications:
   webhooks:
     urls:
       - https://webhooks.gitter.im/e/60e610197dad8edc59f9