diff --git a/templates/macros.html b/templates/macros.html
index d0a31d54347c749d657d97c8f6aace4a8b17c01a..55155e1cc5e9b2763a6ed2e61e0d59c1d20d9135 100644
--- a/templates/macros.html
+++ b/templates/macros.html
@@ -56,7 +56,7 @@
 	<track srclang="de" kind="chapters" src="{{ url_for('chapters',lectureid=lecture.id) }}" />
 </video>
 <script>
-$('#videoplayer').addClass("vjs-16-9");
+$('#videoplayer').addClass("vjs-fluid");
 $('#videoplayer').css("width");
 $(function() {
 videojs("videoplayer").ready(function() {