diff --git a/backend/src/Squidex.Infrastructure/States/ISnapshotStore.cs b/backend/src/Squidex.Infrastructure/States/ISnapshotStore.cs
index c8f3ee41a..68243db74 100644
--- a/backend/src/Squidex.Infrastructure/States/ISnapshotStore.cs
+++ b/backend/src/Squidex.Infrastructure/States/ISnapshotStore.cs
@@ -6,7 +6,6 @@
 // ==========================================================================
 
 using System;
-using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
 
diff --git a/backend/src/Squidex/Areas/IdentityServer/Controllers/Error/ErrorController.cs b/backend/src/Squidex/Areas/IdentityServer/Controllers/Error/ErrorController.cs
index 1ba465716..b05af7537 100644
--- a/backend/src/Squidex/Areas/IdentityServer/Controllers/Error/ErrorController.cs
+++ b/backend/src/Squidex/Areas/IdentityServer/Controllers/Error/ErrorController.cs
@@ -9,7 +9,6 @@ using System.Threading.Tasks;
 using IdentityServer4.Models;
 using IdentityServer4.Services;
 using Microsoft.AspNetCore.Diagnostics;
-using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Mvc;
 using Squidex.Infrastructure;
 
diff --git a/backend/src/Squidex/Areas/IdentityServer/Controllers/Setup/SetupController.cs b/backend/src/Squidex/Areas/IdentityServer/Controllers/Setup/SetupController.cs
index 4e44de4e2..0858b24a0 100644
--- a/backend/src/Squidex/Areas/IdentityServer/Controllers/Setup/SetupController.cs
+++ b/backend/src/Squidex/Areas/IdentityServer/Controllers/Setup/SetupController.cs
@@ -8,7 +8,6 @@
 using System;
 using System.Linq;
 using System.Threading.Tasks;
-using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Options;
diff --git a/backend/src/Squidex/Config/Web/WebServices.cs b/backend/src/Squidex/Config/Web/WebServices.cs
index 748ea7eff..625d2b3ff 100644
--- a/backend/src/Squidex/Config/Web/WebServices.cs
+++ b/backend/src/Squidex/Config/Web/WebServices.cs
@@ -17,7 +17,6 @@ using Squidex.Domain.Apps.Entities;
 using Squidex.Infrastructure.Caching;
 using Squidex.Infrastructure.Translations;
 using Squidex.Pipeline.Plugins;
-using Squidex.Pipeline.Robots;
 using Squidex.Shared;
 using Squidex.Web;
 using Squidex.Web.Pipeline;