.travis.yml in hyperclient-0.8.2 vs .travis.yml in hyperclient-0.8.3

@@ -8,15 +8,20 @@
       script:
         - bundle exec danger
     - rvm: 2.3.1
     - rvm: 2.3.0
     - rvm: 2.2.5
+    - rvm: 2.4.0
     - rvm: rbx-2
     - rvm: ruby-head
     - rvm: jruby-head
-    - rvm: jruby-9.1.6.0
+    - rvm: jruby-9.1.7.0
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-head
     - rvm: rbx-2
+
+before_install:
+  - gem update --system
+  - gem install bundler
 
 bundler_args: --without development