diff --git a/lib/private/defaults.php b/lib/private/defaults.php
index c16ebdbe24c..773f2ba4b49 100644
--- a/lib/private/defaults.php
+++ b/lib/private/defaults.php
@@ -212,7 +212,8 @@ class OC_Defaults {
 		if ($this->themeExist('getShortFooter')) {
 			$footer = $this->theme->getShortFooter();
 		} else {
-			$footer = '<a href="'. $this->getBaseUrl() . '" target="_blank">' .$this->getEntity() . '</a>'.
+			$footer = '<a href="'. $this->getBaseUrl() . '" target="_blank"' .
+				' rel="noreferrer">' .$this->getEntity() . '</a>'.
 				' – ' . $this->getSlogan();
 		}