diff --git a/.travis.yml b/.travis.yml
index 997f4d9..7d09903 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,8 @@ addons:
 
 rvm:
   - 2.2
-  - 2.3.0
+  - 2.3.1
+  - 2.4.0-preview3
 matrix:
   allow_failures:
-    - rvm: 2.3.0
+    - rvm: 2.4.0-preview3