diff --git a/Superscribe.ScriptCS/packages.config b/Superscribe.ScriptCS/packages.config
index 9e92666..b3fdb4c 100644
--- a/Superscribe.ScriptCS/packages.config
+++ b/Superscribe.ScriptCS/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Microsoft.Owin" version="2.1.0" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Hosting" version="2.1.0" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="6.0.1" targetFramework="net45" />
   <package id="Nowin" version="0.11.0.0" targetFramework="net45" />