diff --git a/tests/EpiCategories.SandboxApp/packages.config b/tests/EpiCategories.SandboxApp/packages.config
index 25daa1c..70401af 100644
--- a/tests/EpiCategories.SandboxApp/packages.config
+++ b/tests/EpiCategories.SandboxApp/packages.config
@@ -32,7 +32,7 @@
   <package id="Microsoft.Owin.Security.OAuth" version="3.0.0" targetFramework="net48" />
   <package id="Microsoft.Tpl.Dataflow" version="4.5.24" targetFramework="net48" />
   <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net48" />
-  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net48" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net48" />
   <package id="Owin" version="1.0" targetFramework="net48" />
   <package id="System.ComponentModel.Annotations" version="4.4.0" targetFramework="net48" />
   <package id="System.Data.SqlClient" version="4.4.0" targetFramework="net48" />