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---
layout: page
title: Upgrade Guide
---
#### Migration from v2.4.x
The first step to migrate AdminLTE v2.4.x to v3.0 is upgrade the Bootstrap 3 base code to Bootstrap 4, the full instruction here after you upgraded the base code you need to update the markups.
##### Main Header
The biggest change in Main Header is the Logo is moved to Main Sidebar and the Main Header has now color variations, here are all changes:
1. Logo
- `` moved & rebuild to `.brand-link` inside `.main-sidebar`
2. Header / Nav
- `` & `