grunt browser sync not injecting changes

I’m trying to get grunt-browser-sync to inject any css changes into an open browser when a file is updated/changed. But for some reason, I can seem to get it to work and grunt is not giving me any errors to let me know it’s not working.

I’m currently using MAMP since it’s a WordPress based project.

Here’s my Gruntfile.js:

module.exports = function(grunt) {

// Project configuration.
grunt.initConfig({
pkg: grunt.file.readJSON('package.json'),
uglify: {
  build: {
    src: '_/js/libs/*.js', //input
    dest: '_/js/functions.min.js' //output
  }
},
sass: {
  dist: {
    options: {
      loadPath: require('node-bourbon').includePaths,
      loadPath: require('node-neat').includePaths,
      style: 'compressed'
    },
    files: {
      'style.css': 'scss/style.scss'
    }
  }
},

autoprefixer: {
dist: {
  files: {
    'style.css': 'style.css'
  }
 }
},
browserSync: {
        dev: {
            bsFiles: {
                src : 'style.css'
            },
            options: {
                watchTask: true
            }
        }
    },

watch: {
  options: {
    livereload: true
},
js: {
files: ["_/js/libs/*.js"],
tasks: ["ugilify"],
},
sass: {
files: ["scss/*.scss"],
tasks: ["sass", "autoprefixer", "browserSync"],
},
php: {
files: ['*.php']
  },
 }
});

grunt.loadNpmTasks('grunt-contrib-uglify');
grunt.loadNpmTasks('grunt-contrib-sass');
grunt.loadNpmTasks('grunt-contrib-watch');
grunt.loadNpmTasks('grunt-autoprefixer');
grunt.loadNpmTasks('grunt-browser-sync');

// Default task(s).
grunt.registerTask('default', ['uglify', 'sass', 'browserSync', 'watch', 'autoprefixer']);

};

and here’s the output when I save/update a file:

Running "watch" task
Waiting...
>> File "scss/global.scss" changed.
Running "sass:dist" (sass) task
File style.css created.

Running "autoprefixer:dist" (autoprefixer) task
File style.css created.

Running "browserSync:dev" (browserSync) task

Done, without errors.
Completed in 1.478s at Wed May 07 2014 18:47:40 GMT-0500 (CDT) - Waiting...

But then I have to physically refresh the browser to see the changes.

I’m not sure if I am missing something within the grunt file or what.