diff --git a/.travis.yml b/.travis.yml
index 6a0bfe2..7e04379 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,3 +9,5 @@ rvm:
   - "1.9.2"
   - "1.9.3"
   - "2.0.0"
+  - "2.1.8"
+  - "2.2.4"