diff --git a/.travis.yml b/.travis.yml
index 2ce8b88..3636d13 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ sudo: false
 cache: bundler
 language: ruby
 rvm:
-- '2.2'
+- 2.3.1
 env:
   global:
   - secure: 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