diff --git a/package.json b/package.json
index 8f9b8efb04..ceecf21efa 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,9 @@
   "description": "Library and cmd utility to generate GitBooks",
   "main": "lib/index.js",
   "browser": "./lib/browser.js",
+  "engines": {
+    "node": "10"
+  },
   "dependencies": {
     "bash-color": "0.0.4",
     "cheerio": "0.20.0",