wercker.yml in itamae-1.4.5 vs wercker.yml in itamae-1.5.0

@@ -5,10 +5,10 @@
   # See the Ruby section on the wercker devcenter:
   # http://devcenter.wercker.com/articles/languages/ruby.html
   steps:
     # Uncomment this to force RVM to use a specific Ruby version
     - rvm-use:
-        version: 2.1.4
+        version: 2.2.3
 
     - script:
         name: update bundler
         code: gem update bundler