diff --git a/Chapter12/Exercise08.Tests/Exercise08.Tests.csproj b/Chapter12/Exercise08.Tests/Exercise08.Tests.csproj
index 5c0a96e..6002c3e 100644
--- a/Chapter12/Exercise08.Tests/Exercise08.Tests.csproj
+++ b/Chapter12/Exercise08.Tests/Exercise08.Tests.csproj
@@ -13,7 +13,7 @@
 		<PackageReference Include="Guts.Client.WPF" Version="1.0.0" />
 		<PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
-		<PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+		<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
 		<PackageReference Include="NUnit" Version="3.13.2" />
 		<PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
 		<PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />