Once you have published your open textbook you should determine a schedule for subsequent revisions to ensure the content remains relevant and up to date and to verify that external links remain live.
Record your updates:
Aesoph, L.M. (2018). Self-Publishing Guide. Victoria, BC: BCcampus. Retrieved from https://opentextbc.ca/selfpublishguide/
Open Textbook Toolkit (2018). University of Toronto. Retrieved from: http://openetext.onlinelearning.utoronto.ca/future-use/