"send" and "transfer" are only available for objects of type "address payable", not "address". 오류

function buyRealEstate(uint _id, bytes32 _name, uint _age) public payable {
    require(_id >= 0 && _id <= 9);
    buyers[_id] = msg.sender;
    buyerInfo[_id] = Buyer(msg.sender, _name, _age);
    owner.transfer(msg.value);
}
함수에서 onwer.transfer(....); 에 오류가 아래와 같은 오류가 납니다.
"send" and "transfer" are only available for objects of type "address payable", not "address".