AZ489428 - Retirement: Support for Python 3.9 ends on October 31, 2025 – upgrade your Azure Functions apps to Python 3.11

Azure Updates

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Published

Apr 14, 2025

Timeline

  • October 2025
    Retirement

Product

Azure Functions

Tag

Retirements

Category

Compute
Containers
Internet of Things

Description

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. 


Learn more.