[html] Bootstrap 4 img-circle class not working

I'm writing a website in HTML5 and Bootstrap 4 and I'm trying to turn a square image into a circle. In Bootstrap 3 this was easily do-able with .img-circle, but now I can't seem to get it to work and I can't find any answers online. Has Bootstrap dropped the img-circle class or is my code messed up?

It goes something like this:

<!-- Within a tab-content div --> 
<div class="col-xs-7">
    <img src="img/gallery2.JPG" class="img-circle" alt="HelPic>
</div>

Hope somebody can help me out :)

Now the class is this

 <img src="img/img5.jpg" width="200px" class="rounded-circle float-right">

In Bootstrap 4 it was renamed to .rounded-circle

Usage :

<div class="col-xs-7">
    <img src="img/gallery2.JPG" class="rounded-circle" alt="HelPic>
</div>

See migration docs from bootstrap.