Override a Style from LayerSlider in Child Theme

I am trying to override a style set in the layerslider by adding the class to my child theme style sheet. But it is not working. I assume the LayerSlider style sheet is loading AFTER the child theme style sheet. True?

How can I do this:
.ls-fullwidth .ls-nav-prev,
.ls-fullwidth .ls-nav-next {
position: relative;
}

This style change is required in order to meet accessibility requirements. We don’t even display the layerslider navigation. But I need the code to comply.