diff --git a/erpnext/buying/doctype/supplier_quotation/mapper.py b/erpnext/buying/doctype/supplier_quotation/mapper.py
index aebe5d94a4c..67bd32223e6 100644
--- a/erpnext/buying/doctype/supplier_quotation/mapper.py
+++ b/erpnext/buying/doctype/supplier_quotation/mapper.py
@@ -15,8 +15,7 @@ def make_purchase_order(
 ):
 	if args is None:
 		args = {}
-	if isinstance(args, str):
-		args = json.loads(args)
+	args = frappe.parse_json(args)
 
 	def set_missing_values(source, target):
 		target.run_method("set_missing_values")