diff --git a/src/PartsUnlimitedWebsite/packages.config b/src/PartsUnlimitedWebsite/packages.config
index 3e56ab8..bf2423a 100644
--- a/src/PartsUnlimitedWebsite/packages.config
+++ b/src/PartsUnlimitedWebsite/packages.config
@@ -33,7 +33,7 @@
   <package id="Microsoft.AspNet.WebPages" version="3.2.3" targetFramework="net451" />
   <package id="Microsoft.DependencyValidation.Analyzers" version="0.9.0" targetFramework="net451" />
   <package id="Microsoft.jQuery.Unobtrusive.Validation" version="3.2.3" targetFramework="net451" />
-  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net451" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net451" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net451" />
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net451" />
   <package id="Microsoft.Owin.Security.Cookies" version="3.0.1" targetFramework="net451" />