diff --git a/.travis.yml b/.travis.yml
index 684a6eb..b1a85b2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,9 +2,9 @@ language: ruby
 sudo: false
 
 rvm:
-  - 2.1.10
-  - 2.2.5
-  - 2.3.1
+  - 2.2.7
+  - 2.3.4
+  - 2.4.1
   - ruby-head
 matrix:
   allow_failures: