Constitution Modified by Amulet of Health

I have found an amulet of health and when I drag and drop the item in my character sheet it get automatically equipped but either Const or HP are not increasing ( original CON was 16, supposed to raise up to 19). Is there a way you can make it automatically?

Which character sheet are you using?

Charactermancer 5E d&d

Go to your equipment, edit the Amulet of Health, on the Mods line put:  Item Type: Adventuring Gear, Constitution: 19 It seems it did not get the correct information put into it's Mods line, I suggest filing a bug report on it via the Help Center . Note: I do not know if the new constitution will then fix your hitpoints in the Charactermancer. It may require manual recalculation. 

THANK YOU Gauss,  it did work perfectly on the CON value but it actually does not work in re calculating HP

There is no auto-calculation portion of the character sheet when it comes to HP.  The Charactermancer has it's own calculation section for that. It may, or it may not, take your updated constitution score into account the next time you level up. You will need to keep an eye on it. 

super Thanks