diff --git a/erpnext/stock/doctype/material_request/mapper.py b/erpnext/stock/doctype/material_request/mapper.py
index 5561ad8251f..cb2d19c0adb 100644
--- a/erpnext/stock/doctype/material_request/mapper.py
+++ b/erpnext/stock/doctype/material_request/mapper.py
@@ -53,8 +53,7 @@ def make_purchase_order(
 ):
 	if args is None:
 		args = {}
-	if isinstance(args, str):
-		args = json.loads(args)
+	args = frappe.parse_json(args)
 
 	is_subcontracted = (
 		frappe.db.get_value("Material Request", source_name, "material_request_type") == "Subcontracting"