diff --git a/SimcProfileParser.Tests/SimcParserService_ParseProfileTests.cs b/SimcProfileParser.Tests/SimcParserService_ParseProfileTests.cs
index ae95549..4aea16c 100644
--- a/SimcProfileParser.Tests/SimcParserService_ParseProfileTests.cs
+++ b/SimcProfileParser.Tests/SimcParserService_ParseProfileTests.cs
@@ -1,5 +1,4 @@
 using Microsoft.Extensions.Logging;
-using Newtonsoft.Json;
 using NUnit.Framework;
 using NUnit.Framework.Legacy;
 using Serilog;
@@ -8,6 +7,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Text.Json;
 using System.Threading.Tasks;
 
 namespace SimcProfileParser.Tests
@@ -241,8 +241,8 @@ public void SPS_Parses_Professions()
             };
 
             // Act
-            var expectedProfessions = JsonConvert.SerializeObject(professions);
-            var actualProfessions = JsonConvert.SerializeObject(ParsedProfile.Professions);
+            var expectedProfessions = JsonSerializer.Serialize(professions);
+            var actualProfessions = JsonSerializer.Serialize(ParsedProfile.Professions);
 
             // Assert
             ClassicAssert.IsNotNull(ParsedProfile);
@@ -270,8 +270,8 @@ public void SPS_Parses_Items()
             };
 
             // Act
-            var expectedItem = JsonConvert.SerializeObject(fourthItem);
-            var actualItem = JsonConvert.SerializeObject(ParsedProfile.Items[3]);
+            var expectedItem = JsonSerializer.Serialize(fourthItem);
+            var actualItem = JsonSerializer.Serialize(ParsedProfile.Items[3]);
 
             // Assert
             ClassicAssert.IsNotNull(ParsedProfile);
@@ -300,8 +300,8 @@ public void SPS_Parses_ItemLevelSpecific()
             };
 
             // Act
-            var expectedItem = JsonConvert.SerializeObject(sixteenthItem);
-            var actualItem = JsonConvert.SerializeObject(ParsedProfile.Items[15]);
+            var expectedItem = JsonSerializer.Serialize(sixteenthItem);
+            var actualItem = JsonSerializer.Serialize(ParsedProfile.Items[15]);
 
             // Assert
             ClassicAssert.IsNotNull(ParsedProfile);
@@ -334,8 +334,8 @@ public void SPS_Parses_CraftedItemStats()
             };
 
             // Act
-            var expectedItem = JsonConvert.SerializeObject(seventhItem);
-            var actualItem = JsonConvert.SerializeObject(ParsedProfile.Items[7]);
+            var expectedItem = JsonSerializer.Serialize(seventhItem);
+            var actualItem = JsonSerializer.Serialize(ParsedProfile.Items[7]);
 
             // Assert
             ClassicAssert.IsNotNull(ParsedProfile);
diff --git a/SimcProfileParser/DataSync/CacheService.cs b/SimcProfileParser/DataSync/CacheService.cs
index 7ed95e5..0ded226 100644
--- a/SimcProfileParser/DataSync/CacheService.cs
+++ b/SimcProfileParser/DataSync/CacheService.cs
@@ -1,5 +1,4 @@
 using Microsoft.Extensions.Logging;
-using Newtonsoft.Json;
 using SimcProfileParser.Interfaces.DataSync;
 using SimcProfileParser.Model.DataSync;
 using System;
@@ -9,6 +8,7 @@
 using System.Linq;
 using System.Net;
 using System.Net.Http;
+using System.Text.Json;
 using System.Threading.Tasks;
 
 namespace SimcProfileParser.DataSync
@@ -239,7 +239,7 @@ async Task<T> ICacheService.GetParsedFileContentsAsync<T>(SimcParsedFileType fil
 
             var fileText = await File.ReadAllTextAsync(localPath);
 
-            var deserialisedData = JsonConvert.DeserializeObject<T>(fileText);
+            var deserialisedData = JsonSerializer.Deserialize<T>(fileText);
 
             _cachedFileData.Add(fileType, deserialisedData);
 
@@ -268,7 +268,7 @@ async Task ICacheService.GenerateParsedFileAsync(SimcParsedFileType fileType)
             var localPath = Path.Combine(BaseFileDirectory, configuration.LocalParsedFile);
 
             _logger?.LogTrace("Saving parsed json data for [{configuration.ParsedFileType}] to [{localPath}]", configuration.ParsedFileType, localPath);
-            await File.WriteAllTextAsync(localPath, JsonConvert.SerializeObject(parsedData));
+            await File.WriteAllTextAsync(localPath, JsonSerializer.Serialize(parsedData));
         }
 
         void ICacheService.RegisterFileConfiguration(CacheFileConfiguration configuration)
@@ -457,7 +457,7 @@ internal async Task<List<FileETag>> GetCacheDataAsync(bool force = false)
             {
                 var data = await File.ReadAllTextAsync(cacheDataFile);
 
-                var deserialised = JsonConvert.DeserializeObject<List<FileETag>>(data);
+                var deserialised = JsonSerializer.Deserialize<List<FileETag>>(data);
 
                 if (deserialised != null)
                     results = deserialised;
@@ -476,7 +476,7 @@ internal async Task SaveCacheDataAsync(List<FileETag> data)
                 Directory.CreateDirectory(baseDirectory.OriginalString);
 
             var cacheDataFile = Path.Combine(BaseFileDirectory, _etagCacheDataFile);
-            var dataString = JsonConvert.SerializeObject(data, Formatting.Indented);
+            var dataString = JsonSerializer.Serialize(data, new JsonSerializerOptions { WriteIndented = true });
 
             await File.WriteAllTextAsync(cacheDataFile, dataString);
         }
diff --git a/SimcProfileParser/SimcItemCreationService.cs b/SimcProfileParser/SimcItemCreationService.cs
index 195833f..18dc7fd 100644
--- a/SimcProfileParser/SimcItemCreationService.cs
+++ b/SimcProfileParser/SimcItemCreationService.cs
@@ -1,5 +1,4 @@
 using Microsoft.Extensions.Logging;
-using Newtonsoft.Json;
 using SimcProfileParser.Interfaces;
 using SimcProfileParser.Interfaces.DataSync;
 using SimcProfileParser.Model.DataSync;
@@ -9,6 +8,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.Json;
 using System.Threading.Tasks;
 
 namespace SimcProfileParser
@@ -333,7 +333,7 @@ internal async Task ProcessBonusIdsAsync(SimcItem item, IList<int> bonusIds, int
                             break;
 
                         default:
-                            var entryString = JsonConvert.SerializeObject(entry);
+                            var entryString = JsonSerializer.Serialize(entry);
                             _logger?.LogTrace($"[{item.ItemId}] [{bonusId}:{entry.Type}] Unknown bonus entry: {entry.Type} ({bonusId}): {entryString}");
                             break;
                     }
diff --git a/SimcProfileParser/SimcProfileParser.csproj b/SimcProfileParser/SimcProfileParser.csproj
index e22a15c..aae83db 100644
--- a/SimcProfileParser/SimcProfileParser.csproj
+++ b/SimcProfileParser/SimcProfileParser.csproj
@@ -34,6 +34,5 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="9.0.9" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.9" />
-    <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
   </ItemGroup>
 </Project>