How to upload theme updated version to wordpress theme directory

Hi there,
I have developed and added a theme to WordPress theme directory.
http://wordpress.org/themes/cleanblogg/
Updated version has been developed and I need to upload it. I tried to upload it by going to https://wordpress.org/themes/upload/
But theme uploading is currently disabled. I couldn’t find a another path to upload. I have no idea about how to upload updated theme.
Thanks for help.