diff --git a/.travis.yml b/.travis.yml
index 7eab2c3..d2452af 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,8 +4,8 @@ cache: bundler
 
 rvm:
   - 1.9.3
-  - 2.2.5
-  - 2.3.1
+  - 2.2.6
+  - 2.3.3
   - jruby-1.7 # JRuby in 1.9 mode
   - jruby-9.0.5.0
 #  - rbx-2.5.8