Juventus will reportedly confirm that Massimiliano Allegri has agreed terms on a new contract at some stage tomorrow.
The 48-year-old's previous deal had been due to expire in the summer of 2017.
However, according to Gazzetta dello Sport, the head coach has now secured a 12-month extension.
Under Allegri's guidance, Juve have won two Serie A titles and one Coppa Italia.
They also reached the final of last season's Champions League, where they were defeated by Barcelona.