Cisco 1751 Configuration Commands

I am looking for the configuration command to change a line in my router. I know how to login and how to do the “config t” command. I need to change my DNS servers. The current section reads:

ip dhcp pool lan
network 192.168.0.0 255.255.255.0
default-router 192.168.0.1
dns-server 209.116.x.x 216.99.x.x
netbios-name-server 192.168.0.76

I am looking to change the dns-server line.

Thank you.