diff --git a/2013/RazorWebApiOwin/RazorWebApiOwin/packages.config b/2013/RazorWebApiOwin/RazorWebApiOwin/packages.config
index 460cad70..66911c74 100644
--- a/2013/RazorWebApiOwin/RazorWebApiOwin/packages.config
+++ b/2013/RazorWebApiOwin/RazorWebApiOwin/packages.config
@@ -7,7 +7,7 @@
   <package id="Microsoft.AspNet.WebApi.Owin" version="5.0.0-rc1" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.WebHost" version="5.0.0-rc1" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebPages" version="3.0.0-rc1" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="2.0.0-rc1" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Diagnostics" version="2.0.0-rc1" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="2.0.0-rc1" targetFramework="net45" />
   <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net45" />