.travis.yml in service_contract-0.3.0 vs .travis.yml in service_contract-0.4.0

@@ -1,3 +1,9 @@
 env:
   global:
-    - CODECLIMATE_REPO_TOKEN=2ca11363f82515a172ab992c3e4bacf032fc088c57a9907bcb2bcb9eaa71e344 
\ No newline at end of file
+    - CODECLIMATE_REPO_TOKEN=2ca11363f82515a172ab992c3e4bacf032fc088c57a9907bcb2bcb9eaa71e344
+
+rvm:
+  - 2.1.0
+  - 2.2.0
+
+before_install: gem install bundler