diff --git a/README.md b/README.md
index c4ce932..50e26e3 100644
--- a/README.md
+++ b/README.md
@@ -17,20 +17,10 @@ The node-onvif provides you with the APIs as follows:
 
 Besides, the node-onvif provides you with simple APIs that allow you to control ONVIF network cameras easily even if you are not familiar with the ONVIF specifications.
 
-## Dependencies
-
-- [Node.js](https://nodejs.org/en/) 4.4 +
-  - Though the node-enocean-utils works on Node 4 for now, it is strongly recommended to use Node 6 or newer. The node-onvif will not support Node 4 in the future.
-- [xml2js](https://www.npmjs.com/package/xml2js) 0.4.17 +
-- [html](https://www.npmjs.com/package/html) 1.0.0 + (optional)
-
 ## Installation
 
 ```
-$ cd ~
-$ npm install xml2js
-$ npm install html
-$ npm install node-onvif
+$ npm install -s node-onvif
 ```
 
 ## Sample Application
diff --git a/package.json b/package.json
index ebd6a2f..af3d26e 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,9 @@
   "name": "node-onvif",
   "version": "0.1.3",
   "description": "The node-onvif is a Node.js module which allows you to communicate with the network camera which supports the ONVIF specifications.",
+  "engines": {
+    "node" : ">=4.4"
+  },
   "main": "./lib/node-onvif.js",
   "files": [
     "lib",