diff --git a/Book/Samples/Chapter 5/GreatWall5-1/GreatWall/packages.config b/Book/Samples/Chapter 5/GreatWall5-1/GreatWall/packages.config
index ba72625..5718d0b 100644
--- a/Book/Samples/Chapter 5/GreatWall5-1/GreatWall/packages.config	
+++ b/Book/Samples/Chapter 5/GreatWall5-1/GreatWall/packages.config	
@@ -15,6 +15,6 @@
   <package id="Microsoft.IdentityModel.Tokens" version="5.1.4" targetFramework="net46" />
   <package id="Microsoft.Rest.ClientRuntime" version="2.3.2" targetFramework="net46" />
   <package id="Microsoft.WindowsAzure.ConfigurationManager" version="3.1.0" targetFramework="net46" />
-  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net46" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net46" />
   <package id="System.IdentityModel.Tokens.Jwt" version="5.1.4" targetFramework="net46" />
 </packages>
\ No newline at end of file