diff --git a/packages/commerce/src/schemas/cart.ts b/packages/commerce/src/schemas/cart.ts
index f582ae951..298b46c19 100644
--- a/packages/commerce/src/schemas/cart.ts
+++ b/packages/commerce/src/schemas/cart.ts
@@ -1,7 +1,7 @@
 import { z } from 'zod'
 
 export const getCartBodySchema = z.object({
-  cartId: z.string(),
+  cartId: z.string().optional(),
 })
 
 export const cartItemBodySchema = z.object({