diff --git a/IoT/Connector/AUserBackend.cs b/IoT/Connector/AUserBackend.cs
index a90a384..5097498 100644
--- a/IoT/Connector/AUserBackend.cs
+++ b/IoT/Connector/AUserBackend.cs
@@ -1,8 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace BlubbFish.Utils.IoT.Connector {
   public abstract class AUserBackend {
diff --git a/IoT/Connector/Helper.cs b/IoT/Connector/Helper.cs
index 41e3b27..eb8a5ac 100644
--- a/IoT/Connector/Helper.cs
+++ b/IoT/Connector/Helper.cs
@@ -1,8 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace BlubbFish.Utils.IoT.Connector {
   public class UserMessageEventArgs : EventArgs {