diff --git a/.travis.yml b/.travis.yml
index 5202f12..5e94a95 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,7 +26,7 @@ rvm:
 
 matrix:
   include:
-    - rvm: 2.3.5
+    - rvm: 2.4.2
       env: COVERAGE=1
 
   allow_failures: