diff --git a/topshelf-angular2-service-webpack/Service.Website/packages.config b/topshelf-angular2-service-webpack/Service.Website/packages.config
index cd4bfac..b91cc3f 100644
--- a/topshelf-angular2-service-webpack/Service.Website/packages.config
+++ b/topshelf-angular2-service-webpack/Service.Website/packages.config
@@ -4,7 +4,7 @@
   <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net46" />
   <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.3" targetFramework="net46" />
   <package id="Microsoft.AspNet.WebApi.OwinSelfHost" version="5.2.3" targetFramework="net46" />
-  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net46" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net46" />
   <package id="Microsoft.Owin.Host.HttpListener" version="3.0.1" targetFramework="net46" />
   <package id="Microsoft.Owin.Hosting" version="3.0.1" targetFramework="net46" />
   <package id="Nancy" version="1.4.1" targetFramework="net46" />