diff --git a/SignalROneToOneDemo/packages.config b/SignalROneToOneDemo/packages.config
index 5f41e5c..c02e07e 100644
--- a/SignalROneToOneDemo/packages.config
+++ b/SignalROneToOneDemo/packages.config
@@ -21,7 +21,7 @@
   <package id="Microsoft.AspNet.WebPages.zh-Hans" version="3.2.4" targetFramework="net45" />
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="2.0.0" targetFramework="net45" />
   <package id="Microsoft.jQuery.Unobtrusive.Validation" version="3.2.4" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="2.1.0" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="2.1.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.SystemWeb.zh-Hans" version="4.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Security" version="2.1.0" targetFramework="net45" />