diff --git a/src/asquare.py b/src/asquare.py
index c5bdcf0..c09fdda 100644
--- a/src/asquare.py
+++ b/src/asquare.py
@@ -289,19 +289,22 @@ async def update_itm(item_id: str, lego_set: dict, item_data: dict = None):
 
         print(f"[@DEBUG] Upserting item {item_id} with name: {pw_name}")
 
-        # Perform upsert
-        result = await client.catalog.upsert_catalog_object(body=upsert_body)
+        # Perform upsert using batch_upsert_catalog_objects (async version)
+        result = await client.catalog.batch_upsert_catalog_objects(
+            body={
+                "idempotency_key": upsert_body["idempotency_key"],
+                "batches": [{"objects": [upsert_body["object"]]}],
+            }
+        )
         result_json = json.loads(result.model_dump_json())
 
-        if result_json.get("catalog_object"):
+        if result_json.get("objects"):
             print(f"[@DEBUG] ✓ Successfully updated item {item_id}")
             # TODO: Handle image upload separately (Square Images API)
             # This requires multipart/form-data upload
             return True
         else:
-            print(
-                f"[@ERROR] Failed to update item {item_id}: No catalog_object in response"
-            )
+            print(f"[@ERROR] Failed to update item {item_id}: No objects in response")
             return False
 
     except Exception as e: