.travis.yml in mongoid-history-0.8.1 vs .travis.yml in mongoid-history-0.8.2

@@ -14,10 +14,10 @@
   - MONGOID_VERSION=6
   - MONGOID_VERSION=7
   - MONGOID_VERSION=HEAD
 
 rvm:
-  - 2.3.1
+  - 2.3
 
 before_install:
   - gem update bundler
 
 before_script: