diff --git a/.travis.yml b/.travis.yml
index 4bb86a87..94bb48a5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,7 @@
 language: node_js
 node_js:
+  - "4"
+  - "5"
   - "6"
   - "7"
   - "8"