diff --git a/templates/macros.html b/templates/macros.html
index 9b79926d54a025963fd0ed9fd9fd148ff2b85f4d..1e95d1fd9680e547463f4209466ec2ae241d2f34 100644
--- a/templates/macros.html
+++ b/templates/macros.html
@@ -2,7 +2,7 @@
 <li class="list-group-item">
 	<a class="hidden-xs" href="{{url_for('lecture', id=lecture['id'])}}" title="{{ lecture['coursetitle'] }}" style="color: #000">
 		<div class="row">
-			<img class="col-xs-4" src="{{ config.VIDEOPREFIX }}/{{ lecture['titlefile'] }}" alt="Vorschaubild">
+			<img class="col-xs-4" style="max-height: 100px; width: auto;" src="{{ config.VIDEOPREFIX }}/{{ lecture['titlefile'] }}" alt="Vorschaubild">
 			<div class="col-xs-4">
 				<span><strong>{{ lecture['short'] }}</strong></span><br>
 				<span>{{ lecture['time'] }}</span>