diff --git a/SignalRGroupChat/packages.config b/SignalRGroupChat/packages.config
index 54a1d6c..07e4e65 100644
--- a/SignalRGroupChat/packages.config
+++ b/SignalRGroupChat/packages.config
@@ -22,7 +22,7 @@
   <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="4.0.1" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.2.2" targetFramework="net45" />
   <package id="Microsoft.Owin.Cors" version="4.0.1" 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" />