diff --git a/.travis.yml b/.travis.yml
index d317b2c..0f81517 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,8 @@ language: ruby
 rvm:
   - 2.1
   - 2.2
-  - 2.3.3
+  - 2.3
+  - 2.4
   - ruby-head
   - jruby-head
 #  - rbx-2