Warner Music Group Corp. was sued by George Gershwin’s heirs over claims they’re owed $4.5 million in royalties and interest from works of the late composer of “Rhapsody in Blue” and “Porgy and Bess.”

The claims relate to the rental of Gershwin’s works outside the U.S. and Canada, worldwide licensing of ballets, worldwide licensing of concert grand rights and Warner Music’s failure to register copyrights in a timely manner, according to the complaint filed Jan. 11 in New York state court in Manhattan.