diff --git a/Umbraco2FA/Umbraco/Fortress/packages.config b/Umbraco2FA/Umbraco/Fortress/packages.config
index f8b2bcc..1d86d53 100644
--- a/Umbraco2FA/Umbraco/Fortress/packages.config
+++ b/Umbraco2FA/Umbraco/Fortress/packages.config
@@ -23,7 +23,7 @@
   <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.3" targetFramework="net452" />
   <package id="Microsoft.AspNet.WebPages" version="3.2.3" targetFramework="net452" />
   <package id="Microsoft.IO.RecyclableMemoryStream" version="1.2.1" targetFramework="net452" />
-  <package id="Microsoft.Owin" version="3.1.0" targetFramework="net452" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net452" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="3.1.0" targetFramework="net452" />
   <package id="Microsoft.Owin.Security" version="3.1.0" targetFramework="net452" />
   <package id="Microsoft.Owin.Security.Cookies" version="3.1.0" targetFramework="net452" />