diff --git a/README.md b/README.md
index 2f0f1648e13..62dc2a657dc 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,8 @@ ESLint is a tool for identifying and reporting on patterns found in ECMAScript/J
 
 ## Installation and Usage
 
+Prerequisites: [Node.js](https://nodejs.org/en/) (>=4.x), npm version 2+.
+
 There are two ways to install ESLint: globally and locally.
 
 ### Local Installation and Usage