diff --git a/book/packages.config b/book/packages.config
index f7673ae..6009063 100644
--- a/book/packages.config
+++ b/book/packages.config
@@ -18,7 +18,7 @@
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="1.0.0" targetFramework="net452" />
   <package id="Microsoft.Net.Compilers" version="1.0.0" targetFramework="net452" developmentDependency="true" />
   <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net452" />
-  <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net452" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net452" />
   <package id="Ninject" version="3.2.2.0" targetFramework="net452" />
   <package id="Ninject.Extensions.Logging" version="3.2.2.0" targetFramework="net452" />
   <package id="Ninject.Extensions.Logging.Log4net" version="3.2.3.0" targetFramework="net452" />