deploy lambda without redeploy layer

Hi,
I'm using the serverless-python-requirements to create the layer for the requirements packages like in README.md file.

I'm wondering if there is a way to deploy the layer once, in the first deploy and then deploy only the functions?

[mei-tech]

Or deploy it only, if "requirements.txt" has changed. Would save so much deployment time for me (I think for most of you, too) because the external modules take most of the needed upload file size to s3 for me!

That would be a great feature!!