diff --git a/2013/OwinKatanaAndOneAspNet/OwinDiagnostics/packages.config b/2013/OwinKatanaAndOneAspNet/OwinDiagnostics/packages.config
index 786b5f0a..94297b15 100644
--- a/2013/OwinKatanaAndOneAspNet/OwinDiagnostics/packages.config
+++ b/2013/OwinKatanaAndOneAspNet/OwinDiagnostics/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Microsoft.Owin" version="2.0.0-rc1" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.1.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Diagnostics" version="2.0.0-rc1" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.HttpListener" version="2.0.0-rc1" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="2.0.0-rc1" targetFramework="net45" />