diff --git a/.travis.yml b/.travis.yml
index f541185e..6604b7fa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,9 +6,12 @@ rvm:
   - 1.8.7
   - 1.9.3
   - 2.0.0
-  - 2.1
-  - 2.2
+  - 2.1.8
+  - 2.2.4
+  - 2.3.0
+  - ruby-head
   - jruby-19mode
+  - jruby-9.0.4.0
   - jruby-head
   - rbx-2
   - rbx-1
@@ -20,3 +23,4 @@ matrix:
     - rvm: rbx-2
     - rvm: rbx-1
     - rvm: 1.8.7
+    - rvm: ruby-head