diff --git a/.travis.yml b/.travis.yml
index 109967f3..f2c0336e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,8 @@
 language: ruby
 rvm:
-- 2.2
+- 2.2.6
+- 2.3.4
+- 2.4.1
 gemfile:
 - gemfiles/Sinatra_1.gemfile
 - gemfiles/Sinatra_2.gemfile