diff --git a/.travis.yml b/.travis.yml
index 8f24e27ed44d624f8582d0bc83ab497111a6db5c..b1525f4ae848d914bceff3567121797090edc2d4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,8 @@
 language: cpp
 
+rvm:
+  - rbx-2.1.1
+
 git:
   depth: 500