diff --git a/examples/upload.sh b/examples/upload.sh
index 71b43a7..701fcfa 100755
--- a/examples/upload.sh
+++ b/examples/upload.sh
@@ -4,16 +4,16 @@ api="http://127.0.0.1:3000/upload"
 key="b29eb8b9-9bcd-4e6e-bb4f-d244ada12736"
 
 basename="${2%.*}"
-aacfile="$basename.aac"
+mp3file="$basename.mp3"
 jsonfile="$basename.json"
 system=$1
 wavfile="$basename.wav"
 
 exec >/dev/null 2>&1
 
-nice -n 19 ffmpeg -i "$wavfile" -af dynaudnorm=m=20 "$aacfile" && \
+nice -n 19 ffmpeg -i "$wavfile" -af dynaudnorm=m=20 "$mp3file" && \
 curl $api \
-    -F "audio=@$aacfile;type=audio/aac" \
+    -F "audio=@$mp3file;type=audio/mpeg" \
     -F "json=@$jsonfile;type=application/json" \
     -F "key=$key" \
     -F "system=$system" \