diff --git a/developer-south-coast/2018-02-modernizing-dotnet-with-docker/src/SignUp.Web/packages.config b/developer-south-coast/2018-02-modernizing-dotnet-with-docker/src/SignUp.Web/packages.config
index 9fba37a..2db6077 100644
--- a/developer-south-coast/2018-02-modernizing-dotnet-with-docker/src/SignUp.Web/packages.config
+++ b/developer-south-coast/2018-02-modernizing-dotnet-with-docker/src/SignUp.Web/packages.config
@@ -15,7 +15,7 @@
   <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net452" />
   <package id="Modernizr" version="2.6.2" targetFramework="net452" />
   <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" />
   <package id="Respond" version="1.2.0" targetFramework="net452" />
   <package id="WebGrease" version="1.5.2" targetFramework="net452" />
 </packages>
\ No newline at end of file