diff --git a/util/reserved.json b/util/reserved.json
index a7ac38faf..e223c1b44 100644
--- a/util/reserved.json
+++ b/util/reserved.json
@@ -110,6 +110,7 @@
     "registrar",
     "registry",
     "reserved",
+    "rdap",
     "root",
     "secure",
     "security",