diff --git a/dockercon/2017-copenhagen/mta-dotnet/src/DockerSamples.AspNetChat.Web/packages.config b/dockercon/2017-copenhagen/mta-dotnet/src/DockerSamples.AspNetChat.Web/packages.config
index 716192d..98e0406 100644
--- a/dockercon/2017-copenhagen/mta-dotnet/src/DockerSamples.AspNetChat.Web/packages.config
+++ b/dockercon/2017-copenhagen/mta-dotnet/src/DockerSamples.AspNetChat.Web/packages.config
@@ -15,7 +15,7 @@
   <package id="Microsoft.AspNet.Web.Optimization" version="1.1.3" targetFramework="net452" />
   <package id="Microsoft.AspNet.WebPages" version="3.2.3" targetFramework="net452" />
   <package id="Microsoft.jQuery.Unobtrusive.Validation" version="3.2.3" targetFramework="net452" />
-  <package id="Microsoft.Owin" version="2.1.0" targetFramework="net452" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net452" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="2.1.0" targetFramework="net452" />
   <package id="Microsoft.Owin.Security" version="2.1.0" targetFramework="net452" />
   <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net452" />