diff --git a/lib/classes/Markup.class.php b/lib/classes/Markup.class.php
index da040fa7aadc1a59779828b3489a3829a2c5f4d2..fbde67b07bfb02d682cd0f460709f19a4153f4a6 100644
--- a/lib/classes/Markup.class.php
+++ b/lib/classes/Markup.class.php
@@ -363,7 +363,8 @@ class Markup
             'border-color',
             'border-style',
             'float',
-            'border'
+            'border',
+            'vertical-align'
         ]);
         $config->set('CSS.MaxImgLength', null);