File upload: Can't upload .glb file

Hi together,
I’m trying to use a “files” field to upload GTLF files with a .glb ending. Apparently these file types are not setup, I get “Invalid file type”.
How can I add them to the accepted files?
I’m using Kirby 3.5.

Thank you
Ben

There is currently a PR to support custom mime types: Support extending custom file and mime types by afbora · Pull Request #2777 · getkirby/kirby · GitHub