I was surprised that Basel is still using default WP jquery v 1.x which is discontinuied and obsolete for few years now and because of that some very old versions of 3rd party plugins.
I tried to update to 3.2.1, so far everything is working fine, just needed to update jquery-pjax and waypoints.
Our theme is compatible with a stable version of the jQuery library that comes with the WordPress core. We are not able to update it since it doesn’t depend on the theme.