ipython - nbconvert not adding custom.js -

i converted .ipynb file html using command:

ipython nbconvert notebook.ipynb --to html

it contains custom.css link

<link href="custom.css" rel="stylesheet">

but no custom.js.

my custom.js , custom.css located at:

~/.ipython/profile_default/static/custom/

how can include custom

<script src="custom.js"></script>

while using nbconvert.

My