diff --git a/Superscribe.Demo.FSharp/packages.config b/Superscribe.Demo.FSharp/packages.config
index bdee9f5..11c5ce3 100644
--- a/Superscribe.Demo.FSharp/packages.config
+++ b/Superscribe.Demo.FSharp/packages.config
@@ -2,7 +2,7 @@
 <packages>
   <package id="Dynamitey" version="1.0.2.0" targetFramework="net45" />
   <package id="FSharp.Dynamic" version="1.4.2.0" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="3.0.0" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Hosting" version="3.0.0" targetFramework="net45" />
   <package id="Nowin" version="0.13.4.0" targetFramework="net45" />
   <package id="Owin" version="1.0" targetFramework="net45" />