.travis.yml in retriable-3.0.0 vs .travis.yml in retriable-3.0.1

@@ -8,18 +8,22 @@
   - 2.2.6
   - 2.3.3
   - 2.4.0
   - rbx
   - jruby-9.0.5.0
-  - jruby-9.1.6.0
+  - jruby-9.1.7.0
   - ruby-head
   - jruby-head
 
 matrix:
   allow_failures:
-    - rvm: rbs
+    - rvm: rbx
     - rvm: ruby-head
     - rvm: jruby-head
 
+before_install:
+  - gem update --system
+  - gem install bundler
+  
 addons:
   code_climate:
     repo_token: 20a1139ef1830b4f813a10a03d90e8aa179b5226f75e75c5a949b25756ebf558