diff --git a/frontend/types/global.d.ts b/frontend/types/global.d.ts
index 46e5ed8..637c56c 100644
--- a/frontend/types/global.d.ts
+++ b/frontend/types/global.d.ts
@@ -71,6 +71,7 @@ declare global {
         discount: number;
         color: string;
         video: string | null;
+        cart_quantity : number;
     };
 
     type Product = {