diff --git a/.travis.yml b/.travis.yml
index 6121525d8..6833ce4c2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,8 @@ node_js:
   - 10
   - 9
   - 8
+  - 6
 notifications:
   email: false
 after_script:
-  - npm install coveralls & coveralls
\ No newline at end of file
+  - npm install coveralls & coveralls