diff --git a/README.md b/README.md
index 912e14e..7d22dc4 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 
 ## Introduction
 
-PHP SVG Font files reader and manipulator.
+PHP SVG Font files reader and manipulator. It uses [PHP Unicode](https://github.com/cybercog/php-unicode) package under the hood.
 
 ## Installation