diff --git a/src/Engine/Convert/WkHtmlToPdf.php b/src/Engine/Convert/WkHtmlToPdf.php
index 33158ba..064c662 100644
--- a/src/Engine/Convert/WkHtmlToPdf.php
+++ b/src/Engine/Convert/WkHtmlToPdf.php
@@ -73,6 +73,11 @@ class WkHtmlToPdf extends EngineBase {
       'description' => 'Display line above the footer',
       'mode' => Shell::SHELL_ARG_BOOL_DBL,
     ),
+    array(
+      'name' => 'footer-spacing',
+      'description' => 'Spacing between footer and content in mm (default 0)',
+      'mode' => Shell::SHELL_ARG_BOOL_DBL,
+    ),
     array(
       'name' => 'footer-font-size',
       'description' => 'Set footer font size (default 12)',