diff --git a/.travis.yml b/.travis.yml
index 5891a951..609035d4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -48,6 +48,7 @@ matrix:
   - { rvm: 2.1.10,        env: RAILS_VERSION=master }
   - { rvm: 2.2.8,        env: RAILS_VERSION=master }
   - { rvm: 2.3.5,        env: RAILS_VERSION=master }
+  - { rvm: 2.4.2,        env: RAILS_VERSION=master }
   - { rvm: 2.1.10,        env: RAILS_VERSION=5.0 }
   - { rvm: 2.1.10,        env: RAILS_VERSION=5.1 }
   - { rvm: 2.1.10,        env: RAILS_VERSION=5.2 }