How can I lock my Lambda function to prevent accidental changes?

Is there an easy way to lock a specific AWS Lambda function to prevent accidental changes? [Some functions] [1] that are used in the production environments for maintenance purposes are not a part of the development cycle. I'm looking for a way (similar to termination protection) to lock these functions to prevent changes. [1]: https://aws.amazon.com/blogs/security/how-to-automatically-update-your-security-groups-for-amazon-cloudfront-and-aws-waf-by-using-aws-lambda/