diff --git a/lib/constants.dart b/lib/constants.dart
index 542cad3..053ca64 100644
--- a/lib/constants.dart
+++ b/lib/constants.dart
@@ -10,10 +10,12 @@ const colorMainBlue = Color(0xFF1f74ad);
 enum Format {
   mp3(
       format: 'MP3',
+      ytCmd: 'bestaudio[ext=m4a]/bestaudio[ext=webm]',
       ffmpegCmd: '-f mp3 -loglevel quiet -ab 192k -vn',
       extension: 'mp3'),
   mp3HD(
       format: 'MP3 HD',
+      ytCmd: 'bestaudio[ext=m4a]/bestaudio[ext=webm]',
       ffmpegCmd: '-f mp3 -loglevel quiet -ab 320k -vn',
       extension: 'mp3'),
   mp4(format: 'MP4'),
@@ -35,7 +37,11 @@ enum Format {
       ffmpegCmd:
           '-vcodec libx264 -preset slower -b 512k -bt 512k -threads 0 -s 640x360 -aspect 16:9 -acodec libmp3lame -ar 44100 -ab 32 -progress pipe:1',
       extension: 'flv'),
-  m4a(format: 'M4A'),
+  m4a(
+    format: 'M4A',
+    ytCmd: 'bestaudio[ext=m4a]',
+    extension: 'm4a',
+  ),
   ;
 
   final String ytCmd;