diff --git a/erpnext/buying/doctype/purchase_order/purchase_order.py b/erpnext/buying/doctype/purchase_order/purchase_order.py
index 976ee5bbf9e..be27000db2b 100644
--- a/erpnext/buying/doctype/purchase_order/purchase_order.py
+++ b/erpnext/buying/doctype/purchase_order/purchase_order.py
@@ -549,11 +549,11 @@ def item_last_purchase_rate(name, conversion_rate, item_code, conversion_factor=
 
 
 @frappe.whitelist()
-def close_or_unclose_purchase_orders(names: str, status: str):
+def close_or_unclose_purchase_orders(names: str | list, status: str):
 	if not frappe.has_permission("Purchase Order", "write"):
 		frappe.throw(_("Not permitted"), frappe.PermissionError)
 
-	names = json.loads(names)
+	names = frappe.parse_json(names)
 	for name in names:
 		po = frappe.get_lazy_doc("Purchase Order", name)
 		if po.docstatus == 1: