Index: Gruntfile.js
===================================================================
--- Gruntfile.js	(revision 34691)
+++ Gruntfile.js	(working copy)
@@ -545,16 +545,6 @@
 					interval: 2000
 				}
 			},
-			browserify: {
-				files: [
-					SOURCE_DIR + 'wp-includes/js/media/**/*.js',
-					'!' + SOURCE_DIR + 'wp-includes/js/media/*.manifest.js'
-				],
-				tasks: ['browserify', 'copy:dynamic'],
-				options: {
-					spawn: false
-				}
-			},
 			config: {
 				files: 'Gruntfile.js'
 			},
@@ -686,6 +676,7 @@
 		}
 
 		src = [ path.relative( SOURCE_DIR, filepath ) ];
+
 		if ( action === 'deleted' ) {
 			grunt.config( [ 'clean', 'dynamic', 'src' ], src );
 		} else {
Index: package.json
===================================================================
--- package.json	(revision 34691)
+++ package.json	(working copy)
@@ -11,7 +11,7 @@
   "devDependencies": {
     "autoprefixer-core": "~5.2.1",
     "grunt": "~0.4.5",
-    "grunt-browserify": "~3.8.0",
+    "grunt-browserify": "~4.0.0",
     "grunt-contrib-clean": "~0.6.0",
     "grunt-contrib-compress": "~0.13.0",
     "grunt-contrib-concat": "~0.5.1",