Could not create animated emoji by GIF files!?

[popeyaho001]

While I uploading the GIF file, got this error, PNG, and JPG still fine, any else got something this, I read doc discord python, they wrote only PNG and JPG are supported. In this project, including GIF, need someone to confirm that

File "/app/.heroku/python/lib/python3.6/site-packages/discord/client.py", line 2526, in create_custom_emoji
img = utils._bytes_to_base64_data(image)
File "/app/.heroku/python/lib/python3.6/site-packages/discord/utils.py", line 247, in _bytes_to_base64_data
mime = _get_mime_type_for_image(data)
File "/app/.heroku/python/lib/python3.6/site-packages/discord/utils.py", line 243, in _get_mime_type_for_image
raise InvalidArgument('Unsupported image type given')
discord.errors.InvalidArgument: Unsupported image type given