Django admin Chosen template

change_form.html

{% extends "admin/change_form.html" %}
{% load i18n admin_static admin_modify %}
{% load url from future %}
{% load admin_urls %}

{% block extrahead %}
{{ block.super }}

{% if not is_popup %}
    <link href="{{ STATIC_URL }}admin/chosen/chosen.css" type="text/css" media="screen" rel="stylesheet">
    <link href="{{ STATIC_URL }}admin/chosen/linssen.css" type="text/css" media="screen" rel="stylesheet">
    <script type="text/javascript" src="{{ STATIC_URL }}admin/chosen/chosen.jquery.min.js"></script>
    <script type="text/javascript" src="{{ STATIC_URL }}admin/chosen/linssen.js"></script>
{% endif %}
{% endblock %}