diff --git a/.travis.yml b/.travis.yml
index 0f72e3c44..3b84b675a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,6 @@ language: node_js
 node_js:
   #- stable # disable for now due to an issue of indirect dep upath with Node 9
   - 8
-  - 6
 
 # Use containers.
 # http://docs.travis-ci.com/user/workers/container-based-infrastructure/