The veteran midfielder has moved to assure supporters there is "no possibility" he will leave the club in the summer and will sign fresh terms at the earliest opportunity
The veteran midfielder's current deal expires at the end of the season and he is yet to commit his future to the Bianconeri.
However, he has now revealed that there is been a delay over minor details and assured fans he will still be representing the club next term.
"I still haven't signed. There are little things we are talking about but there is no possibility that I'll go. The announcement will be there shortly," he told La Gazzetta dello Sport.
"Things have been busy and we've not had the time to sort it out. We'll fix things once we have a minute, the fans can rest assured."
Pirlo also revealed that he and coach Antonio Conte have an excellent relationship, although he conceded tempers can flare when he is left out of the starting XI.
"The coach and I have always got along well. Sure, sometimes we argue - you'll never see a player leave the field or sit on the bench with a smile on his face," he said.
"But they are small things. He's one of the best I've had. He's a great coach and I was amazed by his tactical preparation, concentration and ability to stay focused.
"His desire to chase perfection is amazing. He transfers all that stuff into the team well."
Juventus faces Fiorentina in the first leg of their Europa League last-16 tie on Thursday.