diff --git a/README.md b/README.md
index 60a6e49..77f60af 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,7 @@ Other repositories about PHP FFI:
 - [SDL Image bindings for PHP](https://github.com/SerafimArts/ffi-sdl-ttf)
 - [PHP-IUP Gui ToolKit using FFI](https://github.com/ghostjat/php-iup)
 - [Shooter game written using PHP 7.4 FFI](https://github.com/darkin1/PhpShooter)
+- [PHP desktop gui using Tcl/Tk](https://github.com/skoro/php-tkui)
 
 PHP FFI tricks: