diff --git a/Samples/SimpleConfExample/packages.config b/Samples/SimpleConfExample/packages.config
index daae64f..93714d2 100644
--- a/Samples/SimpleConfExample/packages.config
+++ b/Samples/SimpleConfExample/packages.config
@@ -6,7 +6,7 @@
   <package id="Microsoft.AspNet.WebApi.Cors" version="5.1.1" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.Owin" version="5.1.1" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.OwinSelfHost" version="5.1.1" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="2.1.0" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Cors" version="2.1.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.HttpListener" version="2.0.2" targetFramework="net45" />
   <package id="Microsoft.Owin.Hosting" version="2.0.2" targetFramework="net45" />