diff --git a/.travis.yml b/.travis.yml
index 5c5a47dc6..9f73b73b1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,6 +17,7 @@ language: java
 sudo: false
 
 jdk:
+  - openjdk6
   - openjdk7
   - oraclejdk8