.travis.yml in active_model_serializers-0.10.3 vs .travis.yml in active_model_serializers-0.10.4

@@ -2,11 +2,11 @@
 
 sudo: false
 
 rvm:
   - 2.1
-  - 2.2.3
-  - 2.3.0
+  - 2.2.6
+  - 2.3.3
   - ruby-head
   - jruby-9.0.4.0
   - jruby-head
 
 jdk: