node.js - How do I upgrade my npm installation? -

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i've been unable upgrade npm installation.

i tried installing new version of npm:

1.step

npm install npm -g  npm install npm --save-dev

2.step

npm outdated   package  current  wanted  latest npm        3.5.3   3.5.4   3.5.3

package.json

{   "name": "tiko",   "version": "1.0.0",   "description": "",   "main": "index.js",   "scripts": {     "test": "echo \"error: no test specified\" && exit 1"   },   "author": "",   "license": "isc",   "devdependencies": {   } } 
npm update  npm warn ebundleoverride replacing bundled node_modules\npm\node_modules\init-pa ckage-json new installed version npm warn ebundleoverride replacing bundled node_modules\npm\node_modules\npm-ins tall-checks new installed version npm warn ebundleoverride replacing bundled node_modules\npm\node_modules\node-gy p new installed version npm warn ebundleoverride replacing bundled node_modules\npm\node_modules\npmlog new installed version npm warn ebundleoverride replacing bundled node_modules\npm\node_modules\read-pa ckage-json new installed version 
npm outdated   package  current  wanted  latest  location npm        3.5.4   3.5.4   3.5.3  tiko

is npm update not working?

you can update npm installation using npm itself.

you need install newest version of npm global package:

$ npm install npm -g

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