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AWS Control Tower now supports Python 3.9 runtime



Today, we are announcing an update to AWS Control Tower that includes a change to the Notification Forwarder Lambda to use the Python version 3.9 runtime. This update addresses the planned deprecation of Python version 3.6 runtime. Function invocations continue indefinitely after the runtime version reaches end of support. However, AWS strongly recommends that you migrate functions to a supported runtime version so that you continue to receive security patches and remain eligible for technical support. Please refer to the [runtime deprecation policy]( for additional deprecation details. To implement the updated Notification Forwarder Lambda, you can perform a landing zone update by going to the Landing Zone Settings page in your AWS Control Tower dashboard, selecting the 2.9 version and clicking the Update button. After updating your landing zone, you must then [update all accounts that are governed by AWS Control Tower]( To learn more, visit the [AWS Control Tower homepage](/controltower/) or see the [AWS Control Tower User Guide]( For a full list of AWS Regions where AWS Control Tower is available, see the [AWS Region Table](/about-aws/global-infrastructure/regional-product-services/).