Canceled or Cancelled?

This is a word that can be spelled both ways. I suggest that we should spell the word canceled with one l.

•  I have included a link that helps support my theory.

http://grammarist.com/spelling/cancel/

The verb in modern American English is usually spelled with one l. In other areas of the world where English is taught and spoken, such as Britain, it is typically spelled with two l’s.

• According to the Merriam Webster online dictionary, and most of the other sources I found, it is spelled both ways. 

https://www.merriam-webster.com/dictionary/cancel

• The British version spell cancelled with two l’s and the American English version spell the word canceled with one l.