Since the official release of Magento 2 in November 2015, upgrading from Magento 1.x has become a goal for store owners and extension vendors. Being a major release, Magento 2 has made leaps forward in the application architecture, which contributes to the upgrade complexity. One of the major challenges is upgrade of a codebase. Code migration tool has been created to tackle this task. Current presentation goes over the capabilities of the tool. We discuss how to employ the tool for a successful upgrade project.