diff --git a/backend/src/Squidex.Domain.Apps.Entities/Apps/Plans/UsageNotifierGrain.cs b/backend/src/Squidex.Domain.Apps.Entities/Apps/Plans/UsageNotifierGrain.cs
index 43d692104..c984376fe 100644
--- a/backend/src/Squidex.Domain.Apps.Entities/Apps/Plans/UsageNotifierGrain.cs
+++ b/backend/src/Squidex.Domain.Apps.Entities/Apps/Plans/UsageNotifierGrain.cs
@@ -10,7 +10,6 @@ using System.Collections.Generic;
 using System.Threading.Tasks;
 using Squidex.Domain.Apps.Entities.Apps.Notifications;
 using Squidex.Infrastructure;
-using Squidex.Infrastructure.Email;
 using Squidex.Infrastructure.Orleans;
 using Squidex.Infrastructure.States;
 using Squidex.Infrastructure.Tasks;