Caitlin Sanchez, the 14-year-old actress who had voiced Dora the Explorer on the Nickelodeon hit show since 2007, has filed a lawsuit against the network. In the suit, Sanchez and her parents claim they were pressed to sign an overly complex contract, and that the actress was underpaid for her work.

Nickelodeon has released the following statement: “The claims being made are baseless. Unfortunately, Caitlin’s voice changed and she was no longer able to portray the Dora character, as happened with the actress who originated the role. Caitlin’s contract was extensively negotiated through her agent and in compliance with her union. She was well-compensated for her work and for personal appearances. We have enjoyed working with Caitlin on Dora the Explorer these past three years, and we did in fact offer her a contract for other work with us.”