diff --git a/Appendix.C/AsyncInteroperability/packages.config b/Appendix.C/AsyncInteroperability/packages.config
index daf634cd..facab807 100644
--- a/Appendix.C/AsyncInteroperability/packages.config
+++ b/Appendix.C/AsyncInteroperability/packages.config
@@ -5,7 +5,7 @@
   <package id="Microsoft.Data.OData" version="5.8.4" targetFramework="net47" />
   <package id="Microsoft.Data.Services.Client" version="5.6.0" targetFramework="net47" />
   <package id="Microsoft.WindowsAzure.ConfigurationManager" version="1.8.0.0" targetFramework="net47" />
-  <package id="Newtonsoft.Json" version="5.0.6" targetFramework="net47" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net47" />
   <package id="System.Spatial" version="5.6.0" targetFramework="net47" />
   <package id="System.ValueTuple" version="4.4.0" targetFramework="net47" />
   <package id="WindowsAzure.Storage" version="4.0.1" targetFramework="net47" />