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AWS Elastic Beanstalk
Developer Guide (API Version 2010-12-01)

Locking Dependencies with npm shrinkwrap

The Node.js platform runs npm install each time you deploy. When new versions of your dependencies are available, they will be installed when you deploy your application, potentially causing the deployment to take a long time.

You can avoid upgrading dependencies by creating an npm-shrinkwrap.json file that locks down your application's dependencies to the current version.

$ npm install $ npm shrinkwrap wrote npm-shrinkwrap.json

Include this file in your source bundle to ensure that dependencies are only installed once.