diff --git a/www/webapp/src/components/Field/RecordCNAME.vue b/www/webapp/src/components/Field/RecordCNAME.vue
index a5850069f..8b69498d0 100644
--- a/www/webapp/src/components/Field/RecordCNAME.vue
+++ b/www/webapp/src/components/Field/RecordCNAME.vue
@@ -2,7 +2,7 @@
 import { helpers } from 'vuelidate/lib/validators';
 import RecordItem from './RecordItem.vue';
 
-const domain = helpers.regex('domain', /^(([a-zA-Z0-9_\\-]+\.)+[a-zA-Z]{2,})[.]?$/);
+const domain = helpers.regex('domain', /^(([a-zA-Z0-9_\\-]+\.)+[a-zA-Z0-9\\-]{2,})[.]?$/);
 const trailingDot = helpers.regex('trailingDot', /[.]$/);
 
 export default {