diff --git a/.travis.yml b/.travis.yml
index d52b06e..8b3d39d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ language: ruby
 rvm:
   - 2.2.5
   - 2.3.1
+  - 2.3.3
 
 cache: bundler
 script: bundle exec middleman build