diff --git a/Chapter7_Layered_Architecture/Exercise1/HeroApp.Tests/packages.config b/Chapter7_Layered_Architecture/Exercise1/HeroApp.Tests/packages.config
index 4f77f45..6f9d690 100644
--- a/Chapter7_Layered_Architecture/Exercise1/HeroApp.Tests/packages.config
+++ b/Chapter7_Layered_Architecture/Exercise1/HeroApp.Tests/packages.config
@@ -5,7 +5,7 @@
   <package id="Guts.Client.Shared" version="3.0.0" targetFramework="net472" />
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.7" targetFramework="net472" />
   <package id="Moq" version="4.14.6" targetFramework="net472" />
-  <package id="Newtonsoft.Json" version="12.0.3" targetFramework="net472" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net472" />
   <package id="NUnit" version="3.12.0" targetFramework="net472" />
   <package id="NUnit3TestAdapter" version="3.16.1" targetFramework="net472" developmentDependency="true" />
   <package id="System.Runtime.CompilerServices.Unsafe" version="4.5.0" targetFramework="net472" />