Williams had been linked with a move to London Wasps, however, the former Blues captain has put pen to paper that will see him end his career at the Cardiff City Stadium.
“I’ve signed a year extension and happy that it’s all done and dusted,” said Williams.
“It’s where I wanted to finish off and I’ve made no secret about that.”
“I’m over the moon that the club have come to an agreement that I will have my last season here.”
“Peter Thomas (the owner), David Young and Bob Norster have all worked hard to make this happen and I’m glad that it has all been sorted out.”
“In fairness Dai never said that he wanted to release me and I totally understood the clubs reasons for not doing things immediately.”
“It wasn’t a great couple of weeks, with the speculation and not being in the Wales squad, but I’ve tried to keep my head down and carried on playing for the region.”
“I was fortunate that the Blues had some big Magners League games so I could concentrate on them.”