diff --git a/package.json b/package.json
index d0669c1..97b22a3 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,9 @@
   "version": "2.3.0",
   "description": "Client-side Bitcoin JavaScript library",
   "main": "./src/index.js",
+  "engines" : {
+    "node" : ">=0.12"
+  },
   "keywords": [
     "bitcoin",
     "browser",