diff --git a/lib/Listener/LoadViewerListener.php b/lib/Listener/LoadViewerListener.php
index 5d14c1b7..266e7dbd 100644
--- a/lib/Listener/LoadViewerListener.php
+++ b/lib/Listener/LoadViewerListener.php
@@ -10,6 +10,6 @@
 
 class LoadViewerListener implements IEventListener {
 	public function handle(Event $event): void {
-		Util::addScript('officeonline', 'viewer');
+		Util::addScript('officeonline', 'viewer', 'viewer');
 	}
 }