@Philippe y. hello you need to call USCIS and let them know that you become a citizen so they can upgrade your case..after that they gonna give you two options either you upload your naturalization certificate online in your account or send them by mail..my advice just upload it online

@Philippe y. that's what I did when I became a citizen i just called them ..was filing for my husband ..

thanks to everyone

bro just in invlove put the certificate of the naturalzaion and write explanation letter to explain that u already become a usc, in one invlove put the document and write in i-130 upgrad in the invlove and send it to the service center which process ur case, may be will get the approval early

thanks