diff --git a/registration-system/index.php b/registration-system/index.php
index 36e9e31d36bbfc67c2e9a7bee3ee70bab198d116..ebf7d8d08fe00b3ebf5760a0f9202c7e6587ad1f 100644
--- a/registration-system/index.php
+++ b/registration-system/index.php
@@ -410,8 +410,8 @@ function index_make_hurrdurr() {
             var hurdur = new HurDur();
             new Elevator({
                 element: document.getElementById('nyan'),
-                mainAudio: 'view/audio/audio.mp3',
-                endAudio: 'view/audio/end-audio.mp3',
+                mainAudio: 'view/audio/audio.ogg',
+                endAudio: 'view/audio/end-audio.ogg',
                 duration: 5000,
                 startCallback: hurdur.start,
                 endCallback: hurdur.stop
diff --git a/registration-system/view/audio/audio.mp3 b/registration-system/view/audio/audio.mp3
deleted file mode 100755
index 2b30a3005a3a6778069b2e55226846aa0ea91c59..0000000000000000000000000000000000000000
Binary files a/registration-system/view/audio/audio.mp3 and /dev/null differ
diff --git a/registration-system/view/audio/audio.ogg b/registration-system/view/audio/audio.ogg
new file mode 100644
index 0000000000000000000000000000000000000000..9ef188c20dec61d700c45496b065740519278e54
Binary files /dev/null and b/registration-system/view/audio/audio.ogg differ
diff --git a/registration-system/view/audio/end-audio.mp3 b/registration-system/view/audio/end-audio.mp3
deleted file mode 100755
index 05df23e2d3e197273afba05385ad196b4a60bd0c..0000000000000000000000000000000000000000
Binary files a/registration-system/view/audio/end-audio.mp3 and /dev/null differ
diff --git a/registration-system/view/audio/end-audio.ogg b/registration-system/view/audio/end-audio.ogg
new file mode 100644
index 0000000000000000000000000000000000000000..18de816831a16fa408ecaab85fd0cb002a31cdf6
Binary files /dev/null and b/registration-system/view/audio/end-audio.ogg differ