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.

[101, 177, 83, 449, 133, 367, 185, 153, 340, 274, 445, 96, 173, 65, 417, 426, 310, 459, 446, 211]
[101, 177, 83, 449, 133, 367, 185, 153, 340, 274, 445, 96, 173, 459, 417, 426, 310, 65, 446, 211]