diff --git a/Dataphoria/Dataphoria.Web/packages.config b/Dataphoria/Dataphoria.Web/packages.config
index 60c3ae9a9..ab22d06bb 100644
--- a/Dataphoria/Dataphoria.Web/packages.config
+++ b/Dataphoria/Dataphoria.Web/packages.config
@@ -24,7 +24,7 @@
   <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.2" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebPages" version="3.2.2" targetFramework="net45" />
   <package id="Microsoft.jQuery.Unobtrusive.Validation" version="3.2.2" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="3.0.0" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.0" 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" />