Given the task definition and input, reply with output. In this task, you are given a list of unique integers you need to swap the positions of maximum and minimum element in the list and return the updated list.

[147, 166, 285, 83, 18, 144, 240, 153, 15, 161, 168, 288, 415, 492, 155, 493, 165, 85, 110, 447]
[147, 166, 285, 83, 18, 144, 240, 153, 493, 161, 168, 288, 415, 492, 155, 15, 165, 85, 110, 447]