Need to add a column to a composite primary key on a replicated table

I currently have a table with a 3 column composite PK, due to business reasons I need to add another column to that PK. However the table is replicated and I am therefore unable to just simply add it to the PK without it giving me an error.

Is there a way to do what I need to do without taking the table out of replication, dropping the table, recreating the table and adding the table back into replication?

Thank you for any assistance.

Wayne E. Pfeffer