diff --git a/Dataphoria/Dataphoria.Web.Core/packages.config b/Dataphoria/Dataphoria.Web.Core/packages.config
index 12c7549ce..5557b73a5 100644
--- a/Dataphoria/Dataphoria.Web.Core/packages.config
+++ b/Dataphoria/Dataphoria.Web.Core/packages.config
@@ -12,7 +12,7 @@
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.Core" version="4.0.30506.0" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebPages" version="3.2.2" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="3.0.0" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.1.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Security" version="3.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Security.Cookies" version="3.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Security.MicrosoftAccount" version="3.0.0" targetFramework="net45" />