Speaking to the Ipswich Evening Star, Keane said: "I need to get the balance of my squad right. I have one or two potential targets, but it's going to be hard, because of financial reasons and where we are in the league. One or two might be at Premier League clubs.
"It could be a busy few weeks ahead, because some of my players need to go out on loan. There are a few who are not even in the squad at the moment, and yet should be playing regularly in the Championship. I don't want their careers to stand still."