Town have taken up 12 month contract extensions on Jon Nolan and Tomas Holy.
Both players were going into the last year of their respective deals but will now remain at Portman Road until the summer of 2022 at least.
Jon joined Blues from Shrewsbury in August 2018 and the 28-year-old midfielder has gone on to make 53 appearances for the Club, scoring five goals.
Goalkeeper Tomas arrived at Portman Road as a free agent in the summer of 2019 having spent two years at Gillingham.
He vied with Wolves loanee Will Norris for the number one position in 2019/20, making 25 appearances for Town.