functions-core-tools-install-extension.md

title	description	services	author	ms.service	ms.topic	ms.date	ms.author	ms.custom
include file	include file	functions	ggailey777	functions	include	09/21/2018	glenga	include file

When you develop functions locally, you can install the extensions you need by using the Azure Functions Core Tools from the Terminal or from a command prompt.

After you have updated your function.json file to include all the bindings that your function needs, run the following command in the project folder.

func extensions install

The command reads the function.json file to see which packages you need, installs them, and rebuilds the extensions project. It adds any new bindings at the current version but does not update existing bindings. Use the --force option to update existing bindings to the latest version when installing new ones.

If you want to install a particular version of a package or you want to install packages before editing the function.json file, use the func extensions install command with the name of the package, as shown in the following example:

func extensions install --package Microsoft.Azure.WebJobs.ServiceBus --version <target_version>

Replace <target_version> with a specific version of the package, such as 3.0.0-beta5. Valid versions are listed on the individual package pages at NuGet.org.