diff --git a/.travis.yml b/.travis.yml
index 4ae84e7..730004d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ language: ruby
 sudo: false
 rvm:
   - "1.8.7"
-  - "2.1.0"
+  - "2.1.8"
   - "2.4.1"
 before_install: gem install bundler # Fix bundler issues on 1.9.3
 before_script: rake travis_ci:prepare