Step 1: Open a web browser and type the IP address of you router into the address bar (The Default IP address is 192.168.0.1).

Step 2: The default username is admin and the password is blank (nothing). Click on Log In.

Step 3: Click on Setup > Network Settings 

Step 4: Under Router Settings, type in the router´s new IP address and  subnet mask. The IP Address that is configured here is the IP Address that you use to access the Web-based management interface. If you change the IP Address here, you may need to adjust your PC´s network settings to access the network again. (You can do this by disconnecting and reconnecting to the network)

Step 5: Click on Save Settings