diff --git a/.travis.yml b/.travis.yml
index 28c69cc..a042f49 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ rvm:
   - 2.2
   - 2.3
   - 2.4
+  - 2.5
   - jruby-head
   - ruby-head
   - jruby-9.1.8.0