diff --git a/.travis.yml b/.travis.yml
index a1cb367..363f1b1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,8 @@ language: node_js
 sudo: false
 node_js:
 - '4'
+- '6'
+- '8'
 env:
   matrix:
   - ELASTIC_VERSION="2.3.0" ELASTIC_URL=https://download.elasticsearch.org/elasticsearch/release/org/elasticsearch/distribution/tar/elasticsearch/2.3.0/elasticsearch-2.3.0.tar.gz