diff --git a/util/reserved-domains.json b/util/reserved-domains.json
index f7cdfe581..797806d1b 100644
--- a/util/reserved-domains.json
+++ b/util/reserved-domains.json
@@ -88,6 +88,7 @@
     "root",
     "sales",
     "schedule",
+    "secure",
     "security",
     "service",
     "services",