diff --git a/Capitolo 17/WebApplication1/packages.config b/Capitolo 17/WebApplication1/packages.config
index c29a6c4..2274024 100644
--- a/Capitolo 17/WebApplication1/packages.config	
+++ b/Capitolo 17/WebApplication1/packages.config	
@@ -15,7 +15,7 @@
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="1.0.0" targetFramework="net46" />
   <package id="Microsoft.jQuery.Unobtrusive.Validation" version="3.2.3" targetFramework="net46" />
   <package id="Microsoft.Net.Compilers" version="1.0.0" targetFramework="net46" developmentDependency="true" />
-  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net46" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net46" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net46" />
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net46" />
   <package id="Microsoft.Owin.Security.Cookies" version="3.0.1" targetFramework="net46" />