diff --git a/backend/src/Squidex/Config/Domain/AssetServices.cs b/backend/src/Squidex/Config/Domain/AssetServices.cs
index 4727705ea..6746ed0c3 100644
--- a/backend/src/Squidex/Config/Domain/AssetServices.cs
+++ b/backend/src/Squidex/Config/Domain/AssetServices.cs
@@ -187,12 +187,12 @@ namespace Squidex.Config.Domain
                 }
             });
 
-            services.AddSingletonAs(c =>
+            services.AddSingletonAs<IInitializable>(c =>
             {
                 var service = c.GetRequiredService<IAssetStore>();
 
                 return new DelegateInitializer(service.GetType().Name, service.InitializeAsync);
-            }).As<IInitializable>();
+            });
         }
     }
 }
diff --git a/backend/src/Squidex/Config/Domain/StoreServices.cs b/backend/src/Squidex/Config/Domain/StoreServices.cs
index 6ce280749..aae4df809 100644
--- a/backend/src/Squidex/Config/Domain/StoreServices.cs
+++ b/backend/src/Squidex/Config/Domain/StoreServices.cs
@@ -181,12 +181,12 @@ namespace Squidex.Config.Domain
             services.AddSingleton(typeof(IPersistenceFactory<>),
                 typeof(Store<>));
 
-            services.AddSingletonAs(c =>
+            services.AddSingletonAs<IInitializable>(c =>
             {
                 var service = c.GetRequiredService<IAssetKeyValueStore<TusMetadata>>();
 
                 return new DelegateInitializer(service.GetType().Name, service.InitializeAsync);
-            }).As<IInitializable>();
+            });
         }
 
         private static IMongoClient GetClient(string configuration)