diff --git a/WebApiTest_Authorized/Web.Api/packages.config b/WebApiTest_Authorized/Web.Api/packages.config
index db3621a..aa35d20 100644
--- a/WebApiTest_Authorized/Web.Api/packages.config
+++ b/WebApiTest_Authorized/Web.Api/packages.config
@@ -23,7 +23,7 @@
   <package id="Microsoft.Data.Edm" version="5.2.0" targetFramework="net45" />
   <package id="Microsoft.Data.OData" version="5.2.0" targetFramework="net45" />
   <package id="Microsoft.Net.Http" version="2.0.20710.0" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Cors" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />