diff --git a/frappe/utils/html_utils.py b/frappe/utils/html_utils.py
index 807c901caa..ef555825b7 100644
--- a/frappe/utils/html_utils.py
+++ b/frappe/utils/html_utils.py
@@ -483,7 +483,6 @@ acceptable_attributes = [
 	"prompt",
 	"radiogroup",
 	"readonly",
-	"rel",
 	"repeat-max",
 	"repeat-min",
 	"replace",