diff --git a/index.html b/index.html
index 495cc3c..7262d5a 100644
--- a/index.html
+++ b/index.html
@@ -69,7 +69,7 @@
     <button onclick="playpause('audioBG')" type="button" name="button"><i class="audioBG fa fa-play"></i></button>
 <audio id="audioBG"
 preload="metadata" onloadedmetadata="mDur(dur1,audioBG)" ontimeupdate="mPlay(dur1,audioBG)">
-<source src="static/audio/HNI_Soundinstall_3tracks_together.webm">
+<source src="static/audio/HNI_Soundinstall_3tracks_together.mp3">
 </audio>
 <input id="dur1" type="range" name="rng" min="0" step="0.25" value="0" onchange="mSet(dur1,audioBG)" style="width: 150px">