diff --git a/.travis.yml b/.travis.yml
index df1ca3df..74e0d908 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,7 @@ rvm:
   - 2.0.0
   - 2.1
   - 2.2
+  - 2.3.1
   - jruby-18mode
   - jruby-19mode
   - jruby-20mode