A dishwasher includes an adjustable dishwasher rack that accommodates certain types of dishes (e.g., bowls) of varying sizes and shapes. The dishwasher rack includes a pair of parallel guide rails. A plurality of retainer assemblies ride along the guide rails. Each of the retainer assemblies has (i) a first clip positioned on the first guide rail, (ii) a second clip positioned on the second guide rail, and (iii) a retaining wire having a first end that is secured to the first clip and a second end that is secured to the second clip.