diff --git a/Get-MediaInfo.psm1 b/Get-MediaInfo.psm1
index a7a76a0..6278d71 100644
--- a/Get-MediaInfo.psm1
+++ b/Get-MediaInfo.psm1
@@ -1,6 +1,6 @@
 
 $videoExtensions = '264', '265', 'asf', 'avc', 'avi', 'divx', 'flv', 'h264', 'h265', 'hevc', 'm2ts', 'm2v', 'm4v', 'mkv', 'mov', 'mp4', 'mpeg', 'mpg', 'mpv', 'mts', 'rar', 'ts', 'vob', 'webm', 'wmv'
-$audioExtensions = 'aac', 'ac3', 'dts', 'dtshd', 'dtshr', 'dtsma', 'eac3', 'flac', 'm4a', 'mka', 'mp2', 'mp3', 'mpa', 'ogg', 'opus', 'thd', 'w64', 'wav'
+$audioExtensions = 'aac', 'ac3', 'dts', 'dtshd', 'dtshr', 'dtsma', 'eac3', 'flac', 'm4a', 'm4b', 'mka', 'mp2', 'mp3', 'mpa', 'ogg', 'opus', 'thd', 'w64', 'wav'
 $cacheVersion    = 45
 $culture         = [Globalization.CultureInfo]::InvariantCulture