How to resize image?

[fifiteen82726]

Here is my html

<a class="embedly-card" data-card-theme="dark" href="https://github.com/embedly/embedly-jquery"></a>
<a class="embedly-card" data-card-theme="dark" href="http://rubyonrails.org/"></a>
<a class="embedly-card" data-card-theme="dark" href="https://www.facebook.com/"></a>

Here is my jquery

<script type="text/javascript">
$( document ).ready(function() {
$.embedly.defaults.key = 'my key';
$.embedly.defaults.query = {width: 150};
$('a').embedly();
});
</script>

it doesn't work, the images still perform original size.