diff --git a/samples/Books Web API/Books.Tests/packages.config b/samples/Books Web API/Books.Tests/packages.config
index 5f14d018..080d42c9 100644
--- a/samples/Books Web API/Books.Tests/packages.config	
+++ b/samples/Books Web API/Books.Tests/packages.config	
@@ -15,7 +15,7 @@
   <package id="Microsoft.Owin.Testing" version="3.0.1" targetFramework="net45" />
   <package id="Moq" version="4.5.21" targetFramework="net45" />
   <package id="MyTested.WebApi" version="1.2.5" targetFramework="net45" />
-  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net45" />
   <package id="Ninject" version="3.2.2.0" targetFramework="net45" />
   <package id="NUnit" version="3.4.1" targetFramework="net45" />
   <package id="NUnit3TestAdapter" version="3.4.1" targetFramework="net45" />