 Purse signed a one-year extension to his contract at Ninian Park in July 2007.In August 2007, he received an injury to his knee cartilage and it was expected that he would be unavailable for up to four weeks, but he contracted an infection during an operation on the injured knee that delayed his return for a much longer period.He made his return to first team football in October, and went on to score a headed goal in the 2–1 League Cup defeat by Liverpool at Anfield on 31 October.