The button-sized devices are designed to work with Apple's 'Find My' network to locate lost items.
The company said its changes to the device will make suspicious tags easier to find, and alert users earlier that an AirTag may be travelling with them.
In January, a number of women told the BBC they had been followed using AirTags.
Apple launched AirTags in April last year. The small, circular devices can be attached to luggage or keys - anything you could lose.