change (one's) ways
To start behaving in a different, usually preferable, way. After I got in yet another fight at school, the headmaster told me that I had to change my ways or else I'd be expelled. No matter how old you are, there is still time to change your ways.
change your ˈways
start to live or behave in a different way from before: I’ve learned my lesson and I’m going to try to change my ways.It’s unlikely your boss will change his ways.