Fix browserify build

package.json

@@ -44,7 +44,7 @@
     "grunt": "~0.4.1",
     "grunt-angular-templates": "~0.5.7",
     "grunt-autoprefixer": "~0.7.2",
-    "grunt-browserify": "^3.0.1",
+    "grunt-browserify": "~3.7.0",
     "grunt-contrib-clean": "~0.5.0",
     "grunt-contrib-compress": "~0.5.2",
     "grunt-contrib-concat": "^0.5.0",
@@ -79,4 +79,4 @@
     "time-grunt": "^1.0.0",
     "wo-smtpclient": "~0.6.0"
   }
-}
+}