diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 3be6331c8f..a8ee693ec4 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -179,6 +179,7 @@
  - [Çağrı Sakaoğlu](https://github.com/ilovepilav)
  _ [Barasingha](https://github.com/MaVdbussche)
  - [Gauvino](https://github.com/Gauvino)
+ - [felix920506](https://github.com/felix920506)
 
 # Emby Contributors
 
diff --git a/MediaBrowser.Model/Net/MimeTypes.cs b/MediaBrowser.Model/Net/MimeTypes.cs
index 5a1871070d..7b510a3379 100644
--- a/MediaBrowser.Model/Net/MimeTypes.cs
+++ b/MediaBrowser.Model/Net/MimeTypes.cs
@@ -87,7 +87,7 @@ namespace MediaBrowser.Model.Net
             { ".dsf", "audio/dsf" },
             { ".dsp", "audio/dsp" },
             { ".flac", "audio/flac" },
-            { ".m4b", "audio/m4b" },
+            { ".m4b", "audio/mp4" },
             { ".mp3", "audio/mpeg" },
             { ".vorbis", "audio/vorbis" },
             { ".webma", "audio/webm" },
diff --git a/tests/Jellyfin.Model.Tests/Net/MimeTypesTests.cs b/tests/Jellyfin.Model.Tests/Net/MimeTypesTests.cs
index 371c3811ab..ccdf017580 100644
--- a/tests/Jellyfin.Model.Tests/Net/MimeTypesTests.cs
+++ b/tests/Jellyfin.Model.Tests/Net/MimeTypesTests.cs
@@ -69,7 +69,7 @@ namespace Jellyfin.Model.Tests.Net
         [InlineData(".dsp", "audio/dsp")]
         [InlineData(".flac", "audio/flac")]
         [InlineData(".m4a", "audio/mp4")]
-        [InlineData(".m4b", "audio/m4b")]
+        [InlineData(".m4b", "audio/mp4")]
         [InlineData(".mid", "audio/midi")]
         [InlineData(".midi", "audio/midi")]
         [InlineData(".mp3", "audio/mpeg")]