diff --git a/packages/ui/certd-server/src/plugins/plugin-template/email/plugin-base.ts b/packages/ui/certd-server/src/plugins/plugin-template/email/plugin-base.ts
index f1133c628..1481a9c81 100644
--- a/packages/ui/certd-server/src/plugins/plugin-template/email/plugin-base.ts
+++ b/packages/ui/certd-server/src/plugins/plugin-template/email/plugin-base.ts
@@ -30,6 +30,7 @@ export class BaseEmailTemplateProvider extends BaseAddon implements ITemplatePro
     },
     order: 9,
     col: { span: 24 },
+    required: true,
   })
   formatType = "";