How to update Customization gear ilvl

I use the customize feature for changing secondary stat ratios. The feature is still stuck on ilvl 670 gear allowances. How do I change it to ilvl 720 stat allotment totals?

I can change the display – you are setting a ratio, so the exact values are for reference only. Under the hood it converts them to percentages, e.g. you want 30% of your secondary stat budget to go to haste, 40% to crit, etc., where all 4 always total to 100%.