diff --git a/.travis.yml b/.travis.yml
index 79f9e0d..a4f7eb9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,8 @@ script:
 rvm:
   - 1.9.3
   - 2.0.0
-  - 2.1.5
+  - 2.1.7
+  - 2.2.3
 
 env:
   global: