Scroll in sidebar not changing

Hey there,

firs of all I want to congratulate you for such an amazing and well designed plugin, congratulations.

It works perfect on the main scroll of my website, but I have a left sidebar which remains with the old “ugly” scrollbar. Can you help me to change it also?

Thanks,
Javier

https://ww.wp.xz.cn/plugins/sis-nicescroll/