diff --git a/README.VENDOR b/README.VENDOR
index 2b2e92d96..5f824afa4 100644
--- a/README.VENDOR
+++ b/README.VENDOR
@@ -16,4 +16,23 @@ change SETUP_CONFIG_FILE to /var/lib/phpmyadmin/config.inc.php and you
 will also probably want to skip directory writable check, so set
 SETUP_DIR_WRITABLE to false.
 
+External libraries
+------------------
+
+phpMyAdmin includes several external libraries, you might want to
+replace them with system ones if they are available, but please note
+that you should test whether version you provide is compatible with the
+one we ship.
+
+Currently known list of external libraries:
+
+js/mootools.js - Mootools js framework
+js/mootools-more.js - Mootools js framework, more extension
+js/jquery - jQuery js framework
+js/colorpicker - jQuery based color picker
+
+libarries/PHPExcel - PHPExcel library for handling Excel files
+libraries/php-gettext - php-gettext library
+libraries/tcpdf - tcpdf library, modified for our needs!
+
 # vim: et ts=4 sw=4 sts=4 tw=72 spell spelllang=en_us