diff --git a/.travis.yml b/.travis.yml
index e998a970a..c64568e03 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,7 @@ addons:
 rvm:
   - 2.2.5
   - 2.3.3
+  - 2.4.2
 
 branches:
   only: