diff --git a/.travis.yml b/.travis.yml
index 30957db..020bc71 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,8 @@
 language: node_js
 node_js:
-  - "4"
   - "6"
   - "8"
+  - "10"
 
 # Use faster Docker architecture on Travis.
 sudo: false