Worsted for Aran

Ok so Im trying to start and make the Amused Sweater Pattern. Im sure this question has been asked before but…
It calls for Aran weight and I have worsted weight. What can I do to make it work?? Does the gauge stay the same and I match it by changing needles sizes? Appreciate the help.

They are really about the same and often used interchangeably. Do a gauge swatch and go from there.

http://www.yarnstandards.com/weight.html

They’re pretty close, aran is a heavy worsted and you should be able to get gauge, you might need to go up a needle size.