Change router password not my wifi passkey

[GoodRich0123]

Hi, 

I have signed into my router to add some restrictions and monitor devices, with my under 16s in the house.  However, it seems to me that anyone who has the network name and wifi password can do the same thing.  I'd like to change the router password (but not the wifi passkey), but it appears that it's one and the same? 

Thanks

[cookiemonsteruk]

@GoodRich0123 

Go to the maintainence tab and log on to the router as usual then go to set password along the top

 

And enter new password