diff --git a/.travis.yml b/.travis.yml
index 141eab1..1a18023 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,8 @@
 language: ruby
 rvm:
-  - 2.3.1
-  - 2.2.5
+  - 2.4.0
+  - 2.3.3
+  - 2.2.6
   - 2.1.10
 install:
   - bundle install