diff --git a/.travis.yml b/.travis.yml
index 3a5f941c..8728f335 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,7 @@ rvm:
   - 2.3.1
   - 2.3.2
   - 2.3.3
+  - 2.4.0
 before_install:
   - "echo 'gem: --no-ri --no-rdoc' > ~/.gemrc"
 before_script: