The directory name is invalid.

[iZN1337]

Hey, so I'm trying to rip a novel off BookLive, because of its name, it's having an issue.

The title is "僕のヒーローアカデミア 雄英白書 I 1-A：授業参観" as you can see there's a special symbol ： and because of that I'm getting errors such as this:

(14:19:47 ERRO) Worker #6 panicked: mkdir downloads\僕のヒーローアカデミア 雄英白書 I 1-A:授業参観 第01巻: The directory name is invalid.

If it's possible, please solve this issue, I don't have the required knowledge for Go, I'd look into it otherwise. Thanks.