diff --git a/samples/Books Web API/Books.Tests/packages.config b/samples/Books Web API/Books.Tests/packages.config
index 5f14d018..ceca6fb5 100644
--- a/samples/Books Web API/Books.Tests/packages.config	
+++ b/samples/Books Web API/Books.Tests/packages.config	
@@ -7,7 +7,7 @@
   <package id="Microsoft.AspNet.Identity.Owin" version="2.2.1" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.2.2" targetFramework="net45" />
   <package id="Microsoft.Owin.Hosting" 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" />