Wales captain Williams has been strongly linked with moves to Arsenal and Liverpool this summer with both clubs looking to bolster their defensive options.
Laudrup is aware of the speculation surrounding Williams' future after another impressive campaign for the central defender and admits they may lose one of their key performers this summer.
He said: "There has been a lot of talk and let's see what happens.
"He extended his contract not so long ago, like I did.
"Maybe we have to accept one player will go but not any more. We have to strengthen to consolidate because a lot of the teams below us in the table will spend more money.
"Those sums are above what we pay so we have to do things in different ways.
"There is a lot of work to do this summer. One thing is to find them and another to then go and sign them."