diff --git a/CSharp/WebForms/WebForms/packages.config b/CSharp/WebForms/WebForms/packages.config
index a420a9b4..5a76fc28 100644
--- a/CSharp/WebForms/WebForms/packages.config
+++ b/CSharp/WebForms/WebForms/packages.config
@@ -18,7 +18,7 @@
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.6" targetFramework="net452" />
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="1.0.0" targetFramework="net452" />
   <package id="Microsoft.Net.Compilers" version="2.6.1" targetFramework="net452" developmentDependency="true" />
-  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net452" />
+  <package id="Microsoft.Owin" version="4.1.1" targetFramework="net452" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net452" />
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net452" />
   <package id="Microsoft.Owin.Security.Cookies" version="3.0.1" targetFramework="net452" />