The family-run firm, which has a brewery and shop in Terrick and runs The Kings Head in Aylesbury's Market Square, is asking members of the public to submit their ideas via an online form.
You can find out more by visiting https://chilternbrewery.co.uk/2020-beers/
A spokesman for the Brewery said: "We want you to be a key part of our planning for next year (which also happens to be our 40th anniversary!) and to let us know what beers you think we should add to our line up.
"It could be a beer we've brewed in years gone by, a revival of another classic style or something boldly new and daring."