This is an appeal from an order reducing child support. A party who requests such a modification must allege and prove a change in circumstances of one or the other of the parties sufficient to justify the modification. Watson v. Watson, 251 Or 65, 66-67, 444 P2d 476 (1968); Hurner v. Hurner, 179 Or 349, 357, 170 P2d 720 (1946); Frothingham and Frothingham, *31022 Or App 39, 537 P2d 1174 (1975). Here, no evidence was introduced concerning change of circumstances.

Reversed.