diff --git a/.travis.yml b/.travis.yml
index 421f0a7..1568c6f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,8 +2,7 @@ language: ruby
 
 rvm:
   - 2.3.1
-  - 2.2
-  - 2.1
+  - 2.2.5
 
 sudo: false
 cache: