---
layout: page
title: Migrating to v4.x.x
---

## Migrating from 3.x.x to 4.0.0

Bootstrap 4 is not backwards compatible with v3.x.x. Use this section as a general guide to upgrading from v3.x.x to v4.0.0. For a broader overview, see [what's new](http://blog.getbootstrap.com/DEAD-LINK-FIX-ME-PLEASE) in the v4.0.0 release announcement.

## Major class changes
This table shows the style changes between v3.x.x and v4.0.0.

<table>
  <thead>
    <tr>
      <th>Bootstrap 3.x.x</th>
      <th>Bootstrap 4.0.0</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td></td>
      <td></td>
    </tr>
  </tbody>
</table>

## What's new
We've added new components and changed some existing ones. Here are the new or updated styles.

<table>
  <thead>
    <tr>
      <th>Component</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td></td>
      <td></td>
    </tr>
  </tbody>
</table>

## What's removed
The following components have been removed in v4.0.0.

<table>
  <thead>
    <tr>
      <th>Component</th>
      <th>Removed from 3.x.x</th>
      <th>4.0.0 Equivalent</th>    
    </tr>
  </thead>
  <tbody>
    <tr>
      <td></td>
      <td></td>
      <td></td>
    </tr>
  </tbody>
</table>

## Additional notes