diff --git a/Elwig/Models/Graph.cs b/Elwig/Helpers/Billing/Graph.cs
similarity index 99%
rename from Elwig/Models/Graph.cs
rename to Elwig/Helpers/Billing/Graph.cs
index b536ef1..b719013 100644
--- a/Elwig/Models/Graph.cs
+++ b/Elwig/Helpers/Billing/Graph.cs
@@ -4,7 +4,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text.Json.Nodes;
 
-namespace Elwig.Models {
+namespace Elwig.Helpers.Billing {
     public class Graph : ICloneable {
 
         public string Type { get; set; }
diff --git a/Elwig/Windows/ChartWindow.xaml.cs b/Elwig/Windows/ChartWindow.xaml.cs
index 9f721e3..8a540bc 100644
--- a/Elwig/Windows/ChartWindow.xaml.cs
+++ b/Elwig/Windows/ChartWindow.xaml.cs
@@ -8,6 +8,7 @@ using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
 using Elwig.Helpers;
+using Elwig.Helpers.Billing;
 using Elwig.Models;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.ChangeTracking;