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.

[492, 388, 498, 400, 55, 351, 371, 182, 125, 231, 174, 60, 227, 398, 237, 143, 324, 252, 358, 209]

[492, 388, 55, 400, 498, 351, 371, 182, 125, 231, 174, 60, 227, 398, 237, 143, 324, 252, 358, 209]