Manager Malky Mackay says he hopes to make a number of signings before the end of August's transfer window to strengthen his Cardiff City squad.
Brighton inflicted the Bluebirds' first defeat under Mackay's reign with a 3-1 victory at Cardiff City Stadium.
Nine new players joined the club during the summer but Mackay admits the squad still needs new additions.
"We don't have the strength in depth at the club. We need to strengthen the squad as a whole," he said.
"There was 12 players left here in the summer. We need senior players and we need to strengthen the squad as a whole.
"We are looking at four of five youngsters who have never been involved in the first team before to supplement the squad right.
"That's not something that's going to help us in a 46 game season.
"We need to get another couple [of players] in to the squad to bulk that up a little bit."
Cardiff's 100% start to the Championship came to an end on Wednesday night as newly-promoted Brighton maintained their own perfect start with a 3-1 victory.
Mackay said mistakes had proved costly against Brighton and that the players would have a chance to put that right against Burnley on Saturday.
"We're ready to go again come Saturday," Mackay said looking ahead to the Turf Moor encounter.
"It will be a tough game. They are a team who have experienced Championship footballers."
Mackay confirmed midfielder Aron Gunnarsson, who missed the Brighton game with an ankle injury, is unlikely to figure against Burnley.