diff --git a/utils/invalid-domains.json b/utils/invalid-domains.json
index 22c26d2b0..1122df7fe 100644
--- a/utils/invalid-domains.json
+++ b/utils/invalid-domains.json
@@ -6,6 +6,7 @@
   "_github-challenge-is-a-dev",
   "_github-pages-challenge-is-a-dev",
   "_gitlab-pages-verification-code",
+  "con",
   "help",
   "no-reply",
   "noreply",