diff --git a/.travis.yml b/.travis.yml
index 9e897cb2..7f40db97 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,6 +24,8 @@
 
 language: node_js
 node_js:
+  - "6"
+  - "7"
   - "8"
   - "9"
   - "10"