grunt-karma RangeError Maximum error

Recently I've wanted to start using Grunt in order to improve my development workflow. Although I've had some trouble while Grunt up and running. After creating a package.json file and a Grunt file.js I've tried running a simple test with grunt-karma with no luck.

All I receive is the error

Loading "grunt-karma.js" tasks...ERROR

RangeError: Maximum call stack size exceeded

I am running node version 10.12 with grunt-cli & grunt versions 0.1.9 and 0.4.1 respectively.

Below is my package file with all of my dev dependancies and my grunt file.

package.json

{
"name": "crudangular",
"version": "0.0.1",
"devDependencies": {
    "grunt": "~0.4.1",
    "karma": "~0.8.6",
    "grunt-karma": "~0.4.4",
    "phantomjs": "~1.9.1-0"
 }
}

Gruntfile.js

module.exports = function(grunt){
grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),
    karma: {
        unit:{
            configFile: 'karma.conf.js'
        }
    }
});
grunt.loadNpmTasks('grunt-karma');
grunt.registerTask('default',['karma']);
}

Any help would be greatly appreciated. Thanks in advance.