diff --git a/PlayTennis/packages.config b/PlayTennis/packages.config
index 8ca7f03..c5dcb8b 100644
--- a/PlayTennis/packages.config
+++ b/PlayTennis/packages.config
@@ -31,7 +31,7 @@
   <package id="Microsoft.AspNet.WebPages" version="3.2.7" targetFramework="net472" />
   <package id="Microsoft.AspNet.WebPages.it" version="3.2.7" targetFramework="net472" />
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="2.0.0" targetFramework="net472" />
-  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net472" />
+  <package id="Microsoft.Owin" version="4.1.1" targetFramework="net472" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="4.0.0" targetFramework="net472" />
   <package id="Microsoft.Owin.Host.SystemWeb.it" version="4.0.0" targetFramework="net472" />
   <package id="Microsoft.Owin.it" version="4.0.0" targetFramework="net472" />