diff --git a/.travis.yml b/.travis.yml
index d61efe9..4758b65 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,11 @@
 cache: bundler
 rvm:
-  - 2.1
-  - 2.0.0
-#  - rbx-2.5.2
+  - 2.4.0
+  - 2.3.3
+  - 2.2
 notifications:
   recipients:
     - cowboyd@thefrontside.net
 before_install:
-  - gem update --system 2.1.11
+  - gem update --system
 script: bundle exec rake compile spec