Defender Richard Taylor will remain a Buddie after St Mirren decided to keep hold of the centre back for another two years.
The 22-year-old initially joined on a six-month deal in January, with the Saints able to extend it should the former Waterford man impress in the stripes during that period.
The left-sided defender made his debut in a 1-1 draw with Hearts in January, making his first start against the Jambos at Tynecastle less than a week later.
