diff --git a/backend/schema/components/stream-object.json b/backend/schema/components/stream-object.json
index 70d9bbf04..16da70fb2 100644
--- a/backend/schema/components/stream-object.json
+++ b/backend/schema/components/stream-object.json
@@ -18,7 +18,7 @@
 		},
 		"incoming_port": {
 			"type": "string",
-			"pattern": "^([0-9]+|[0-9]+-[0-9]+)$",
+			"pattern": "^(?!80$|81$|91$|443$)([0-9]+|[0-9]+-[0-9]+)$",
 			"maxLength": 11
 		},
 		"forwarding_host": {