Malky Mackay has revealed he hopes to bolster his Cardiff City squad before the emergency loan window closes.
The loan window closes at 1700 GMT on Thursday and Mackay will not be able to add anyone until the transfer window opens again in January.
"We've had a couple of options bubbling," said Mackay.
"It is something that is on-going and we're doing everything in our power to get them through but sometimes it is not finances, it is things out of our control."
Cardiff off-loaded striker Jon Parkin to Huddersfield on a two-month loan on Wednesday, making space for a potential replacement to take his place.
A six-match unbeaten run has moved Cardiff up to third in the Championship table behind early-season pace-setters Southampton and West Ham and the Welsh club trail The Hammers by three points.
"It's good to be in the mix but they are two big and strong squads," said Mackay.
The Bluebirds host Nottingham Forest on Saturday and Mackay hopes to unveil a new signing before Steve Cotterill's side visit the Cardiff City Stadium.
"We need to strengthen the whole squad," said Mackay.
"We need to improve the size of our squad to go the full distance as we need to be very lucky with injuries and suspensions as it is normally squads with large numbers and big investments end up at the top of the league.
"We don't have enough players, we have a very small group.
"All of the players we brought in, just about brought the numbers up to bearable. If one or two go down in key positions we don't have cover so we need to strengthen all over."