[aur-general] How can i modify my aur PKGBUILD?

Hi, I'm a newbie. I use gnu/emacs in my working. And Mew is a great plugin of emacs to deal with email. I write the PKGBUILD for the Mew and upload it to the AUR. Now, I found something wrong with those file, and I write a new version of it.How can i update the changes ? I can't find any place in the aur web page to update my work. Who can help me ?