diff --git a/.travis.yml b/.travis.yml
index 969dac8..796f415 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,7 @@ addons:
 
 rvm:
   - 2.2
-  - 2.3.1
+  - 2.3.3
   - 2.4.0-preview3
 matrix:
   allow_failures: