diff --git a/util/reserved.json b/util/reserved.json
index 5c00f4ebc..8ac0501fd 100644
--- a/util/reserved.json
+++ b/util/reserved.json
@@ -63,6 +63,9 @@
     "guest",
     "help",
     "helpdesk",
+    "helper",
+    "helper[1-99]",
+    "helpers",
     "hostmaster",
     "info",
     "infos",