diff --git a/samples/angular-aad-webapi/api/securecall/packages.config b/samples/angular-aad-webapi/api/securecall/packages.config
index a4fc0d052..e09824857 100644
--- a/samples/angular-aad-webapi/api/securecall/packages.config
+++ b/samples/angular-aad-webapi/api/securecall/packages.config
@@ -23,7 +23,7 @@
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="1.0.0" 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="4.0.0" 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.ActiveDirectory" version="3.0.1" targetFramework="net45" />