diff --git a/frappe/model/rename_doc.py b/frappe/model/rename_doc.py
index 2cc5818414..6ffaadc5eb 100644
--- a/frappe/model/rename_doc.py
+++ b/frappe/model/rename_doc.py
@@ -80,6 +80,7 @@ def rename_doc(
 
 	if doctype=='DocType':
 		rename_doctype(doctype, old, new, force)
+		update_customizations(old, new)
 
 	update_attachments(doctype, old, new)
 
@@ -174,6 +175,8 @@ def update_user_settings(old, new, link_fields):
 		else:
 			continue
 
+def update_customizations(old: str, new: str) -> None:
+	frappe.db.set_value("Custom DocPerm", {"parent": old}, "parent", new, update_modified=False)
 
 def update_attachments(doctype, old, new):
 	try: