diff --git a/.travis.yml b/.travis.yml
index 796f415..9ad22ae 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,8 +11,10 @@ addons:
 
 rvm:
   - 2.2
+  - 2.3.2
   - 2.3.3
   - 2.4.0-preview3
 matrix:
   allow_failures:
     - rvm: 2.4.0-preview3
+    - rvm: 2.3.3