diff --git a/backend/src/Squidex.Domain.Apps.Entities.MongoDb/Assets/Visitors/FindExtensions.cs b/backend/src/Squidex.Domain.Apps.Entities.MongoDb/Assets/Visitors/FindExtensions.cs
index 09d9a1670..e062fce13 100644
--- a/backend/src/Squidex.Domain.Apps.Entities.MongoDb/Assets/Visitors/FindExtensions.cs
+++ b/backend/src/Squidex.Domain.Apps.Entities.MongoDb/Assets/Visitors/FindExtensions.cs
@@ -7,7 +7,6 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using MongoDB.Bson;
 using MongoDB.Driver;
 using Squidex.Infrastructure;
 using Squidex.Infrastructure.MongoDb.Queries;