diff --git a/README.md b/README.md
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+++ b/README.md
@@ -575,6 +575,7 @@ Follows best practices and conventions to provide you a SOLID development experi
   * [FormHelper](https://github.com/SinanBozkus/FormHelper) - Form & Validation Helper for ASP.NET Core. Form Helper helps you to create ajax forms and validations without writing any javascript code. (Compatible with Fluent Validation).
   * [Guard](https://github.com/safakgur/guard) - A high-performance, extensible argument validation library.
   * [Valit](https://github.com/valit-stack/Valit) - A dead simple validation for .NET Core. No more if-statements all around your code. Write nice and clean fluent validators instead!
+  * [OrionGuard](https://github.com/Moongazing/OrionGuard) - A modern, fluent guard clause library with security guards, format validation, high-performance FastGuard, result pattern, and localization support.
 * [Vanara](https://github.com/dahall/Vanara) - A set of .NET libraries for Windows implementing PInvoke calls to many native Windows APIs with supporting wrappers.
 * [warden-stack](https://github.com/warden-stack) - "health checks" for your applications, resources and infrastructure. Keep your Warden on the watch.
 * [WebEssentials.AspNetCore.ServiceWorker](https://github.com/madskristensen/WebEssentials.AspNetCore.ServiceWorker) - ASP.NET Core Progressive Web Apps.