How to Fix “Sorry, this file type is not permitted for security reasons”

You get that error because WordPress filter some file types, including some audio file type such as m4a. To make it work you need to allow the file type you want to use for your episodes.

Option 1: Allow your podcast files in your code

Open the wp-config.php file of your WordPress installation and above the line where it says /* That's all, stop editing! Happy blogging. */ add the following code anywhere:

define('ALLOW_UNFILTERED_UPLOADS', true);

Option 2: Use a plugin to allow the files

There are several WordPress plugins that can fix the problem. Here are some plugins you can use to allow the file type you need:

• WP Add Mime Types
• Pro Mime Types
• Mime Types Plus
• Mime Types Extended
• Unsafe Mime Types