Fill Opacity of LCircleMarker

I’m using markers of type LCircleMarker on the map (V-Leaflet). How can I change their opacity? setOpacity influences on opacity of border, but I need to change opacity of the fill. I attempted to influence on it, adding my style to the element, defined with fill-opacity: 1, but this style was not added to the map element.


The fillOpacity seems to be missing from vector style options. I added it right away:


Thanks a lot!