diff --git a/buildstuff/2017-11-modernizing-dotnet-with-docker/src/SignUp.Messaging/packages.config b/buildstuff/2017-11-modernizing-dotnet-with-docker/src/SignUp.Messaging/packages.config
index 3b27c52..a1a72da 100644
--- a/buildstuff/2017-11-modernizing-dotnet-with-docker/src/SignUp.Messaging/packages.config
+++ b/buildstuff/2017-11-modernizing-dotnet-with-docker/src/SignUp.Messaging/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="NATS.Client" version="0.8.0" targetFramework="net452" />
-  <package id="Newtonsoft.Json" version="10.0.2" targetFramework="net452" />
+  <package id="Newtonsoft.Json" version="13.0.2" targetFramework="net452" />
 </packages>
\ No newline at end of file