diff --git a/Chapter01/FlixOne.BookStore/FlixOne.BookStore/packages.config b/Chapter01/FlixOne.BookStore/FlixOne.BookStore/packages.config
index bab8793..6791207 100644
--- a/Chapter01/FlixOne.BookStore/FlixOne.BookStore/packages.config
+++ b/Chapter01/FlixOne.BookStore/FlixOne.BookStore/packages.config
@@ -14,7 +14,7 @@
   <package id="Microsoft.AspNet.WebPages" version="3.2.3" targetFramework="net45" />
   <package id="Microsoft.jQuery.Unobtrusive.Validation" version="3.2.3" targetFramework="net45" />
   <package id="Microsoft.Net.Compilers" version="1.0.0" targetFramework="net45" developmentDependency="true" />
-  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.1.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Security.Cookies" version="3.0.1" targetFramework="net45" />