diff --git a/Elwig/Models/Graph.cs b/Elwig/Models/Graph.cs
index d87ea6d..b536ef1 100644
--- a/Elwig/Models/Graph.cs
+++ b/Elwig/Models/Graph.cs
@@ -1,12 +1,8 @@
-using Newtonsoft.Json.Linq;
 using ScottPlot;
 using System;
 using System.Collections.Generic;
-using System.Diagnostics.Contracts;
 using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows.Markup;
+using System.Text.Json.Nodes;
 
 namespace Elwig.Models {
     public class Graph : ICloneable {
@@ -30,7 +26,7 @@ namespace Elwig.Models {
             DataY = DataGen.Zeros(MaxX - MinX + 1);
         }
 
-        public Graph(string type, int num, JToken graphData, string contracts, int minX, int maxX) {
+        public Graph(string type, int num, JsonObject graphData, string contracts, int minX, int maxX) {
             Type = type;
             Num = num;
             Contracts =  contracts;
@@ -52,8 +48,8 @@ namespace Elwig.Models {
             DataY = dataY;
         }
 
-        private void ParseGraphData(JToken graphData) {
-            var GraphPoints = graphData.Children().OfType<JProperty>().ToDictionary(p => int.Parse(p.Name[..^2]), p => (double)p.Value);
+        private void ParseGraphData(JsonObject graphData) {
+            var GraphPoints = graphData.ToDictionary(p => int.Parse(p.Key[..^2]), p => (double)p.Value?.AsValue());
 
             if (GraphPoints.Keys.Count < 1) {
                 return;
@@ -99,19 +95,19 @@ namespace Elwig.Models {
             }
         }
 
-        public JObject ToJson() {
-            JObject graph = new();
+        public JsonObject ToJson() {
+            JsonObject graph = new();
 
             if (DataY[0] != DataY[1]) {
-                graph.Add(new JProperty(DataX[0] + Type.ToLower(), Math.Round(DataY[0], 4)));
+                graph.Add(new KeyValuePair<string, JsonNode?>(DataX[0] + Type.ToLower(), Math.Round(DataY[0], 4)));
             }
             for (int i = 1; i < DataX.Length - 1; i++) {
                 if (Math.Round(DataY[i] - DataY[i - 1], 4) != Math.Round(DataY[i + 1] - DataY[i], 4)) {
-                    graph.Add(new JProperty(DataX[i] + Type.ToLower(), Math.Round(DataY[i], 4)));
+                    graph.Add(new KeyValuePair<string, JsonNode?>(DataX[i] + Type.ToLower(), Math.Round(DataY[i], 4)));
                 }
             }
             if (DataY[^1] != DataY[^2]) {
-                graph.Add(new JProperty(DataX[^1] + Type.ToLower(), Math.Round(DataY[^1], 4)));
+                graph.Add(new KeyValuePair<string, JsonNode?>(DataX[^1] + Type.ToLower(), Math.Round(DataY[^1], 4)));
             }
             return graph;
         }
diff --git a/Elwig/Windows/ChartWindow.xaml.cs b/Elwig/Windows/ChartWindow.xaml.cs
index c0bd2cf..9f721e3 100644
--- a/Elwig/Windows/ChartWindow.xaml.cs
+++ b/Elwig/Windows/ChartWindow.xaml.cs
@@ -1,21 +1,16 @@
-using System;
+using System;
 using System.Collections.Generic;
-using System.ComponentModel;
-using System.Diagnostics;
-using System.Diagnostics.Contracts;
 using System.Drawing;
 using System.Linq;
+using System.Text.Json.Nodes;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
 using System.Windows.Input;
 using Elwig.Helpers;
 using Elwig.Models;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.ChangeTracking;
-using Newtonsoft.Json.Linq;
 using ScottPlot;
 using ScottPlot.Plottable;
 
@@ -69,14 +64,14 @@ namespace Elwig.Windows {
             }
 
             PaymentVar paymentVar = paymentVars[0];
-            var data = JToken.Parse(paymentVar.Data);
+            var data = JsonNode.Parse(paymentVar.Data).AsObject();
 
-            var auszahlungsSorten = data["AuszahlungSorten"];
+            var auszahlungsSorten = data["AuszahlungSorten"]?.AsObject();
             if (auszahlungsSorten == null) {
                 return;
             }
 
-            var Graphs = auszahlungsSorten["Kurven"];
+            var Graphs = auszahlungsSorten["Kurven"]?.AsArray();
 
             if (Graphs == null) {
                 return;
@@ -86,7 +81,7 @@ namespace Elwig.Windows {
 
             int i = 1;
             foreach (var graph in Graphs) {
-                GraphsList.Add(new Graph("Oe", i, graph, ParseContracts(auszahlungsSorten, i - 1), 50, 140));
+                GraphsList.Add(new Graph("Oe", i, graph?.AsObject(), ParseContracts(auszahlungsSorten, i - 1), 50, 140));
                 i++;
             }
 
@@ -98,17 +93,15 @@ namespace Elwig.Windows {
             RefreshInputs();
         }
 
-        private String ParseContracts(JToken auszahlungsSorten, int num) {
+        private String ParseContracts(JsonObject auszahlungsSorten, int num) {
             List<string> contracts = new();
 
-            foreach (var sorte in auszahlungsSorten.Children().OfType<JToken>()) {
-                if (((JProperty)sorte).Name == "Kurven") {
-                    continue;
-                }
-                foreach (var attribut in sorte.Values().OfType<JToken>()) {
-                    foreach (var bindung in attribut.Values().OfType<JProperty>()) {
-                        if ((int)(bindung).Value == num) {
-                            contracts.Add($"{((JProperty)sorte).Name}/{((JProperty)attribut).Name}/{bindung.Name}");
+            foreach (var sorte in auszahlungsSorten) {
+                if (sorte.Key == "Kurven") continue;
+                foreach (var attribut in sorte.Value.AsObject()) {
+                    foreach (var bindung in attribut.Value.AsObject()) {
+                        if ((int)bindung.Value.AsValue() == num) {
+                            contracts.Add($"{sorte.Key}/{attribut.Key}/{bindung.Key}");
                         }
                     }
                 }
@@ -125,15 +118,14 @@ namespace Elwig.Windows {
             }
 
             PaymentVar paymentVar = paymentVars[0];
-            var data = JToken.Parse(paymentVar.Data);
+            var data = JsonNode.Parse(paymentVar.Data).AsObject();
 
-            var auszahlungsSorten = data["AuszahlungSorten"];
+            var auszahlungsSorten = data["AuszahlungSorten"]?.AsObject();
             if (auszahlungsSorten == null) {
                 return false;
             }
 
-            var Graphs = auszahlungsSorten["Kurven"];
-
+            var Graphs = auszahlungsSorten["Kurven"]?.AsObject();
             if (Graphs == null) {
                 return false;
             }
@@ -141,26 +133,24 @@ namespace Elwig.Windows {
             int i = 1;
             foreach (var graph in Graphs) {
                 if (i == num) {
-                    graph.Remove();
+                    Graphs.Remove(graph.Key);
                     break;
                 }
                 i++;
             }
 
-            foreach (var sorte in auszahlungsSorten.Children().OfType<JToken>()) {
-                if (((JProperty)sorte).Name == "Kurven") {
-                    continue;
-                }
-                foreach (var attribut in sorte.Values().OfType<JToken>()) {
-                    List<JProperty> itemsToRemove = new();
-                    foreach (var bindung in attribut.Values().OfType<JProperty>()) {
-                        if ((int)bindung.Value == num - 1) {
-                            itemsToRemove.Add(bindung);
-                        } else if ((int)bindung.Value > num - 1) {
-                            bindung.Value = (int)bindung.Value - 1;
+            foreach (var sorte in auszahlungsSorten) {
+                if (sorte.Key == "Kurven") continue;
+                foreach (var attribut in sorte.Value.AsObject()) {
+                    var bindungen = attribut.Value.AsObject();
+                    foreach (var bindung in bindungen) {
+                        int v = (int)bindung.Value;
+                        if (v == num - 1) {
+                            bindungen.Remove(bindung.Key);
+                        } else if (v > num - 1) {
+                            bindungen[bindung.Key] = v - 1;
                         }
                     }
-                    itemsToRemove.ForEach(i => i.Remove());
                 }
             }
 
@@ -671,23 +661,22 @@ namespace Elwig.Windows {
             }
 
             PaymentVar paymentVar = paymentVars[0];
-            var data = JToken.Parse(paymentVar.Data);
+            var data = JsonNode.Parse(paymentVar.Data).AsObject();
 
             var auszahlungsSorten = data["AuszahlungSorten"];
             if (auszahlungsSorten == null) {
                 return null;
             }
 
-            var Graphs = auszahlungsSorten["Kurven"];
-
+            var Graphs = auszahlungsSorten["Kurven"].AsArray();
             if (Graphs == null) {
                 return null;
             }
 
             if (IsEditing) {
-                ((JArray)Graphs)[g.Num - 1] = g.ToJson();
+                Graphs[g.Num - 1] = g.ToJson();
             } else if(IsCreating) {
-                ((JArray)Graphs).Add(g.ToJson());
+                Graphs.Add(g.ToJson());
             } else {
                 return null;
             }