diff --git a/.travis.yml b/.travis.yml
index e410d94..6e72d00 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,7 @@ before_install:
 - sudo apt-get update -qq
 - sudo apt-get install -qq libgsl0ldbl libgsl0-dev
 rvm:
-- 2.1.3
+- 2.2.3
 script: 
 - bundle exec jekyll build
 - bundle exec htmlproof --disable-external ./_site