diff --git a/erpnext/stock/doctype/serial_no/serial_no.py b/erpnext/stock/doctype/serial_no/serial_no.py
index 6ea89b2db8b..a8d9b9f1e7d 100644
--- a/erpnext/stock/doctype/serial_no/serial_no.py
+++ b/erpnext/stock/doctype/serial_no/serial_no.py
@@ -222,8 +222,7 @@ def auto_fetch_serial_number(
 
 @frappe.whitelist()
 def get_pos_reserved_serial_nos(filters: str | dict):
-	if isinstance(filters, str):
-		filters = json.loads(filters)
+	filters = frappe.parse_json(filters)
 
 	POSInvoice = frappe.qb.DocType("POS Invoice")
 	POSInvoiceItem = frappe.qb.DocType("POS Invoice Item")