diff --git a/erpnext/selling/doctype/quotation/quotation.py b/erpnext/selling/doctype/quotation/quotation.py
index b2d6e7838a1..8eaf33c084d 100644
--- a/erpnext/selling/doctype/quotation/quotation.py
+++ b/erpnext/selling/doctype/quotation/quotation.py
@@ -6,6 +6,7 @@ import frappe
 from frappe import _
 from frappe.model.document import Document
 from frappe.utils import getdate, nowdate
+from pypika.terms import ExistsCriterion
 
 from erpnext.controllers.selling_controller import SellingController
 
@@ -358,22 +359,31 @@ def get_list_context(context=None):
 
 
 def set_expired_status():
-	# filter out submitted non expired quotations whose validity has been ended
-	cond = "`tabQuotation`.docstatus = 1 and `tabQuotation`.status NOT IN ('Expired', 'Lost') and `tabQuotation`.valid_till < %s"
-	# check if those QUO have SO against it
-	so_against_quo = """
-		SELECT
-			so.name FROM `tabSales Order` so, `tabSales Order Item` so_item
-		WHERE
-			so_item.docstatus = 1 and so.docstatus = 1
-			and so_item.parent = so.name
-			and so_item.prevdoc_docname = `tabQuotation`.name"""
+	quotation = frappe.qb.DocType("Quotation")
+	so = frappe.qb.DocType("Sales Order")
+	so_item = frappe.qb.DocType("Sales Order Item")
 
-	# if not exists any SO, set status as Expired
-	frappe.db.multisql(
-		{
-			"mariadb": f"""UPDATE `tabQuotation`  SET `tabQuotation`.status = 'Expired' WHERE {cond} and not exists({so_against_quo})""",
-			"postgres": f"""UPDATE `tabQuotation` SET status = 'Expired' FROM `tabSales Order`, `tabSales Order Item` WHERE {cond} and not exists({so_against_quo})""",
-		},
-		(nowdate()),
+	# submitted Sales Orders raised against the quotation (correlated to the quotation being updated)
+	so_against_quo = (
+		frappe.qb.from_(so)
+		.from_(so_item)
+		.select(so.name)
+		.where(
+			(so_item.docstatus == 1)
+			& (so.docstatus == 1)
+			& (so_item.parent == so.name)
+			& (so_item.prevdoc_docname == quotation.name)
+		)
 	)
+
+	# expire submitted, non-expired/lost quotations whose validity has ended and that have no SO
+	(
+		frappe.qb.update(quotation)
+		.set(quotation.status, "Expired")
+		.where(
+			(quotation.docstatus == 1)
+			& (quotation.status.notin(["Expired", "Lost"]))
+			& (quotation.valid_till < nowdate())
+			& ExistsCriterion(so_against_quo).negate()
+		)
+	).run()