Two months after switching from Pepsi to Coke, St. Louis-based Imo’s is being sued by its former beverage supplier.

A PepsiCo subsidiary, in a lawsuit filed Thursday in federal court in St. Louis, accuses Imo’s Franchising of breaching the terms of a contract that allowed Pepsi to match offers made by its rivals.

In January, Imo’s announced all 96 of its restaurants would begin selling Coca-Cola products beginning May 1 as part of a new multiyear agreement that it claimed was significantly more lucrative than Pepsi’s and included guaranteed payments for new digital menu boards. The deal severed an exclusive relationship with Pepsi stretching back to Imo’s founding in 1964.

Pepsi is seeking to recover more than $155,000 from Imo’s in what it alleges are overpayments of marketing support funds made to the pizza chain. Pepsi also is seeking a declaratory judgment that it does not owe Imo’s more than $100,000 in unpaid marketing support funds.