Change collapse breakpoint

Hi, how can I change the width of collapse breakpoint?
I need to collapse my navbar starting from 991px, instead of 767px...

Should I simply edit css styles?

Dear antichi !
Thank you for using product our.
Please find to ..module/mod_jux_megamenu/assets/css/ style_reponsive.css
You edit From767px to 991px the below:

@media screen and (max-width: 767px) {
#js-mainnav.megamenu.noJS #css3-megaMenuToggle,
#js-mainnav.megamenu #js-megaMenuToggle {
display: block;
padding: 12px 15px;
cursor: pointer;
font-size: 10px;
text-transform: uppercase;
text-align: left;
}
Edit:
@media screen and (max-width: 991px) {
#js-mainnav.megamenu.noJS #css3-megaMenuToggle,
#js-mainnav.megamenu #js-megaMenuToggle {
display: block;
padding: 12px 15px;
cursor: pointer;
font-size: 10px;
text-transform: uppercase;
text-align: left;
}
Best Regards,
Huyen Tran