April 14, 2025 · Azure
Retirement: Support for Python 3.9 ends on October 31, 2025 – upgrade your Azure Functions apps to Python 3.11
In alignment with the end of community support, on October 31, 2025, support for Python 3.9 in Azure Functions will end. Your apps that are hosted on Functions will continue to run, but security updates and performance optimizations will no longer be available and we'll no longer provide customer service for Python 3.9.
Required action
To avoid potential security vulnerabilities and take advantage of the latest features, follow the steps to upgrade your Functions apps to Python 3.11 by October 31, 2025.
More information
If you have questions, get answers from community experts in Microsoft Q&A. If you have a support plan and you need technical help, open the Azure portal and select the question mark icon at the top of the page.