Update Asterisk to 12.1.0

I installed AsteriskNow (with FreePbx), the asterisk version is 11.3.0. Now I want to update to 12.1.0. Could you please tell me how to do it?

You can not. FreePBX 2.11 does not support Asterisk 12. FreePBX 12 which is in Alpha currently supports Asterisk 12. AsteriskNOW has not built Asterisk 12 RPMs nor have the included FreePBX 12 ALPHA.

I got it. Thanks!