Let us learn about Functions_Extension_Version in this article.


By using the Functions_Extension_Version application settings, you can target a particular version for your Azure Function App. You can also use it if you want to update the version of your Azure Function to a previous or current version.

The value of the Functions_Extension_Version can be like ~3, ~2, ~1, etc. To change it’s value, you can follow the below steps

Login to the Azure Portal (

Navigate to the Azure Function App, click on the configuration from the left navigation, and then click FUNCTIONS_EXTENSION_VERSION.


Once you click on that, You can change the FUNCTIONS_EXTENSION_VERSION value and then click on the OK button as shown below

azure functions_extension_version

The next step is to click the Save button on the Application settings page to update the changes.

Wrapping Up

In this article, we discussed Functions_Extension_Version. Thanks for reading this article !!!