diff --git a/Main/Platform/Base/Owin/packages.config b/Main/Platform/Base/Owin/packages.config
index cdbbb51..bd68bcc 100644
--- a/Main/Platform/Base/Owin/packages.config
+++ b/Main/Platform/Base/Owin/packages.config
@@ -4,7 +4,7 @@
   <package id="Microsoft.AspNet.WebApi.Core" version="5.2.2" targetFramework="net451" />
   <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.2" targetFramework="net451" />
   <package id="Microsoft.AspNet.WebApi.OwinSelfHost" version="5.2.2" targetFramework="net451" />
-  <package id="Microsoft.Owin" version="3.0.0" targetFramework="net451" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net451" />
   <package id="Microsoft.Owin.Diagnostics" version="3.0.0" targetFramework="net451" />
   <package id="Microsoft.Owin.Host.HttpListener" version="3.0.0" targetFramework="net451" />
   <package id="Microsoft.Owin.Hosting" version="3.0.0" targetFramework="net451" />