diff --git a/PhotoSharingApp/PhotoSharingApp.AppService/packages.config b/PhotoSharingApp/PhotoSharingApp.AppService/packages.config
index caf23da..b411417 100644
--- a/PhotoSharingApp/PhotoSharingApp.AppService/packages.config
+++ b/PhotoSharingApp/PhotoSharingApp.AppService/packages.config
@@ -34,7 +34,7 @@
   <package id="Microsoft.Data.OData" version="5.8.4" targetFramework="net45" />
   <package id="Microsoft.Data.Services.Client" version="5.6.4" targetFramework="net45" />
   <package id="Microsoft.Net.Http" version="2.2.29" 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.Host.SystemWeb" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.WindowsAzure.ConfigurationManager" version="3.2.0" targetFramework="net45" />