From 83dda6865588c8e9d60b2b9ba8383cb27b5f5dab Mon Sep 17 00:00:00 2001
From: Joon Ho Cho <joonho1101@gmail.com>
Date: Tue, 8 Aug 2017 04:29:31 -0700
Subject: [PATCH] Update README.md

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index d4b0fc1..af9160c 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,8 @@ FullContact Card Reader API Wrapper for Node.js
 npm install --save fullcontact-card-reader
 ```
 
+Requires `Promise`. Use [es6-promise](https://github.com/stefanpenner/es6-promise) if your Node.js version doesn't implement `Promise`.
+
 
 ### Usage
 ```javascript