Are you planning on handing out M&Ms, Snickers or Twix this Halloween? If so, there’s a chance the sweet goodies were made by child laborers halfway around the world, according to a nonprofit organization that rates major candy companies on social and environmental practices.

Although Mars Inc., the maker of these chocolate candies, received a C+ on Green America’s chocolate scorecard, the company has implemented programs to address other underlying issues of child labor, the report notes. For years the major global chocolate companies have faced criticism, including litigation, for their use of child labor in Cote d’Ivoire and Ghana, where most of the world’s cocoa is produced.