An API Gateway upgrade ensures that you have the latest version of API Gateway and with the latest version you can access all the latest features.

API Gateway follows Blue-Green deployment approach to upgrade to newer version in zero downtime. Blue-green deployment is a technique that reduces downtime and risk by running two identical production environments called blue and green. In such a deployment scenario, the old instance of API Gateway is allowed to run and serve the transactions while the new instance of API Gateway is being prepared for data migration.