Error installing with Gulp

[TiagoDeSousa]

I'm trying to instal this package with gulp but I keep getting the following error:

npm ERR! Darwin 15.6.0 npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "postcss-pxtorem" "--save-dev" npm ERR! node v7.1.0 npm ERR! npm v3.10.9 npm ERR! file /Users/Tiago/Desktop/hyperion/package.json npm ERR! code EJSONPARSE

npm ERR! Failed to parse json npm ERR! Trailing comma in object at 15:3 npm ERR! } npm ERR! ^ npm ERR! File: /Users/Tiago/Desktop/hyperion/package.json npm ERR! Failed to parse package.json data. npm ERR! package.json must be actual JSON, not just JavaScript. npm ERR! npm ERR! This is not a bug in npm. npm ERR! Tell the package author to fix their package.json file. JSON.parse

npm ERR! Please include the following file with any support request: npm ERR! /Users/Tiago/Desktop/hyperion/npm-debug.log

Any ideas of what I'm might be doing wrong? Thanks.

[cuth]

This error just means that NPM could not parse the package.json file. Look for a trailing comma at line 15 and remove it.