diff --git a/src/v2/shop.yaml b/src/v2/shop.yaml
index 2f45d45..28e4c21 100644
--- a/src/v2/shop.yaml
+++ b/src/v2/shop.yaml
@@ -1,7 +1,7 @@
 openapi: 3.0.0
 info:
     title: "TyrePro-API, Shop"
-    version: "Version 8"
+    version: "Version 9"
 servers:
     - url: "https://musterreifen.com/api/shop"
       description: "Development server, customers domain"
@@ -1371,7 +1371,17 @@ components:
                     type: "string"
                     format: "date"
             AmountInCart:
-              type: "number"
+              type: "array"
+              items:
+                type: "object"
+                required:
+                  - "GuidCart"
+                  - "Amount"
+                properties:
+                  GuidCart:
+                    type: "string"
+                  Amount:
+                    type: "number"
         MaterialType:
           type: "object"
           required: