diff --git a/src/code-listings/lesson-43/sample-solution/Tests/packages.config b/src/code-listings/lesson-43/sample-solution/Tests/packages.config
index f2ad990..280d60d 100644
--- a/src/code-listings/lesson-43/sample-solution/Tests/packages.config
+++ b/src/code-listings/lesson-43/sample-solution/Tests/packages.config
@@ -5,7 +5,7 @@
   <package id="FSharp.Core" version="4.0.0.1" targetFramework="net452" />
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.2" targetFramework="net452" />
   <package id="Microsoft.AspNet.WebApi.Core" version="5.2.2" targetFramework="net452" />
-  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net452" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net452" />
   <package id="Unquote" version="3.1.2" targetFramework="net452" />
   <package id="xunit" version="2.1.0" targetFramework="net452" />
   <package id="xunit.abstractions" version="2.0.0" targetFramework="net452" />