Property in joint name of me and father how to get it in my name?

My father was allowed a flat by army welfare in Chandigarh. He paid for it with his own money . the flat was jointly registered in my and my father's name . there is no mutation done yet. In what way I can get the flat fully in my name . so that there are no future claims by my brother or any one else who my father may favour in a will. Presently my father is cooperating with me.