diff --git a/README.md b/README.md
index ff0d329b..311da1e7 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ You only need a Webserver with PHP support.
 
 - PHP 5.3 or higher.
 - PHP module [mbstring](http://php.net/manual/en/book.mbstring.php) for full UTF-8 support.
+- PHP module [intl](http://php.net/manual/en/book.intl.php).
 - Webserver:
   * Apache with module [mod_rewrite](http://httpd.apache.org/docs/current/mod/mod_rewrite.html)
   * Ngnix with module [ngx_http_rewrite_module](http://nginx.org/en/docs/http/ngx_http_rewrite_module.html)
@@ -29,4 +30,4 @@ Installation guide
 
 License
 -------
-Bludit is opensource software licensed under the [MIT license](https://tldrlegal.com/license/mit-license)
\ No newline at end of file
+Bludit is opensource software licensed under the [MIT license](https://tldrlegal.com/license/mit-license)