The 30-year-old Republic of Ireland international has featured 12 times since joining on an initial short-term deal from Brentford in January.

Judge will now remain at Portman Road until the summer of 2021 on a deal that features the option of a further year.

"The supporters have taken to him and his quality is clear to see," boss Paul Lambert told the club website.

"I know he wants to play for Ireland as well, so playing games regularly here can only help in that respect."