diff --git a/.travis.yml b/.travis.yml
index b228156..a51de18 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,7 @@ rvm:
   - 2.2.6
   - 2.3.3
   - 2.4.0
+  - 2.5.0
   - jruby-head
   - ruby-head
 matrix: