diff --git a/demo01/packages.config b/demo01/packages.config
index 38ff64b..75db2b4 100644
--- a/demo01/packages.config
+++ b/demo01/packages.config
@@ -13,7 +13,7 @@
   <package id="Microsoft.AspNet.Web.Optimization" version="1.1.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebPages" version="3.1.2" targetFramework="net45" />
   <package id="Microsoft.jQuery.Unobtrusive.Validation" version="3.1.2" 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.Host.SystemWeb" version="2.1.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Security" version="2.1.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Security.Cookies" version="2.1.0" targetFramework="net45" />