diff --git a/Samples/OrleansApp/WebApp/packages.config b/Samples/OrleansApp/WebApp/packages.config
index bd1f0f7..90ea83a 100644
--- a/Samples/OrleansApp/WebApp/packages.config
+++ b/Samples/OrleansApp/WebApp/packages.config
@@ -17,7 +17,7 @@
   <package id="Microsoft.Orleans.OrleansCodeGenerator" version="1.2.3" targetFramework="net451" />
   <package id="Microsoft.Orleans.OrleansProviders" version="1.2.3" targetFramework="net451" />
   <package id="Microsoft.Orleans.OrleansRuntime" version="1.2.3" targetFramework="net451" />
-  <package id="Microsoft.Owin" version="2.0.2" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.2.2" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.HttpListener" version="2.0.2" targetFramework="net45" />
   <package id="Microsoft.Owin.Hosting" version="2.0.2" targetFramework="net45" />
   <package id="Microsoft.WindowsAzure.ConfigurationManager" version="2.0.0.0" targetFramework="net45" />