diff --git a/Withings.NET/Models/Measuregrp.cs b/Withings.NET/Models/Measuregrp.cs
index cf16be3..9ce8274 100644
--- a/Withings.NET/Models/Measuregrp.cs
+++ b/Withings.NET/Models/Measuregrp.cs
@@ -1,5 +1,4 @@
 using System.Collections.Generic;
-using System.Runtime.Serialization;
 
 namespace Withings.NET.Models
 {
diff --git a/Withings.NET/Models/WithingsBody.cs b/Withings.NET/Models/WithingsBody.cs
index 9bb9188..6f72548 100644
--- a/Withings.NET/Models/WithingsBody.cs
+++ b/Withings.NET/Models/WithingsBody.cs
@@ -1,5 +1,4 @@
 using System.Collections.Generic;
-using System.Runtime.Serialization;
 
 namespace Withings.NET.Models
 {