diff --git a/docs/requirements.rst b/docs/requirements.rst
index c23228bd..636dde40 100644
--- a/docs/requirements.rst
+++ b/docs/requirements.rst
@@ -8,4 +8,5 @@ Requirements
 * For PHP5: 5.5.9+
 * For PHP7: 7.0.8+
 * PHP cURL package
-* PHP PDO mysql driver
\ No newline at end of file
+* PHP PDO mysql driver
+* PHP XML package