diff --git a/utils/invalid-domains.json b/utils/invalid-domains.json
index 45599ab2e..92c127064 100644
--- a/utils/invalid-domains.json
+++ b/utils/invalid-domains.json
@@ -6,6 +6,8 @@
   "notifications",
   "notification",
   "_acme-challenge",
+  "wwww",
+  "ww",
   "ww1",
   "ww2",
   "ww3",