diff --git a/source/Core/packages.config b/source/Core/packages.config
index 8145218ce..b53b45a57 100644
--- a/source/Core/packages.config
+++ b/source/Core/packages.config
@@ -10,7 +10,7 @@
   <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.Tracing" version="5.2.3" 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.Cors" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.FileSystems" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />