Can I Change Bonitasoft logo?

Is it possible to change bonitasoft logo on the portal and put a my logo to it?

I am making changes in the bonita_form_default.css, in this part of code but cannot see any changes on the portal.

div#bonita-open-solution-logo {
background: url("../images/abc-logo.png") no-repeat scroll 20px 8px #FFFFFF !important;
height: 50px;
position: absolute;
width: 200px;

Thank you.