diff --git a/.travis.yml b/.travis.yml
index 7998b53..5144d6f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,9 @@
 language: node_js
 
+node:
+  - 8
+  - 9
+
 cache:
   yarn: true
   directories: