diff --git a/package.json b/package.json
index 2462e49..10bbf90 100644
--- a/package.json
+++ b/package.json
@@ -1,10 +1,13 @@
 {
   "name": "loopback-component-explorer",
-  "version": "3.0.0",
+  "version": "4.0.0-alpha.1",
   "publishConfig": {
     "tag": "next"
   },
   "description": "Browse and test your LoopBack app's APIs",
+  "engines": {
+    "node": ">=4"
+  },
   "main": "index.js",
   "scripts": {
     "lint": "eslint .",