diff --git a/backend/prisma/schema.prisma b/backend/prisma/schema.prisma
index 91be549..7ff1da6 100644
--- a/backend/prisma/schema.prisma
+++ b/backend/prisma/schema.prisma
@@ -658,6 +658,7 @@ enum VisitorStatus {
   CHECKED_IN
   CHECKED_OUT
   DENIED
+  REVOKED
 }
 
 model Visitor {