DDNS update schedule AC5300

[Patch M0]

I have setup DDNS on my AC5300 however, it is not updating. I've done this in DD-WRT before and there is a configuration on how often to update but do not see it in the current ASUS configuration. I checked on NOIP web site and it says last updated a week ago. This obviously is not good since now i can't get to my router via the Internet since the ip has changed

thanks