diff --git a/src/Loupe.Proxy.Demo/packages.config b/src/Loupe.Proxy.Demo/packages.config
index 1f563d2..7f3ceeb 100644
--- a/src/Loupe.Proxy.Demo/packages.config
+++ b/src/Loupe.Proxy.Demo/packages.config
@@ -23,7 +23,7 @@
   <package id="Microsoft.AspNet.WebPages" version="3.2.4" targetFramework="net45" />
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="2.0.0" targetFramework="net45" />
   <package id="Microsoft.jQuery.Unobtrusive.Validation" version="3.2.4" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="3.1.0" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="3.1.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Security" version="3.1.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Security.Cookies" version="3.1.0" targetFramework="net45" />