Because the 1855 classification only included a small number of wineries, in 1939 the Cru Bourgeois system was introduced. It includes over 200 properties and is divided between 9 Cru Bourgeois Exceptionnel, 87 Cru Bourgeois Supérieur, and 151 Cru Bourgeois. The system was updated to include new wines in 1978, and again in 2003. The idea is that the list will updated once about every ten years or so.