         src: '*.css'
         ext: '.min.css'
     uglify:
-      options: {
-        banner: banner_template
-      },
+      options:
+        preserveComments: (node, comment) -> !comment.value.lastIndexOf('@license', 0)
       jail_iframe:
         files:
           'build/jail_iframe.min.js':                        ['build/jail_iframe.js']

        ]
    concat:
      jail_iframe:
        options:
          banner: banner_template
        src: [
          'build/js/jail_iframe/libs/*'
          'build/js/jail_iframe/core.js'

# global config:true, file:true, task:true, module: true

banner_template = """
/*@license
* <%= pkg.title || pkg.name %> - v<%= pkg.version %> - <%= pkg.homepage ? " * " + pkg.homepage : "" %>
* Date: <%= grunt.template.today("m/d/yyyy") %>
* Copyright (c) <%= grunt.template.today("yyyy") %> <%= pkg.author %>
