# Accessibility Checker upgraded to 4.2.2

> Canonical HTML version: https://rocketvalidator.com/blog/accessibility-checker-upgraded-to-4-2-2
> Attribution: Rocket Validator (https://rocketvalidator.com)
> License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

The Accessibility validation server on Rocket Validator has been upgraded to the latest version of Axe released by Deque, 4.2.2

<p>The Accessibility validation server on Rocket Validator has been upgraded to the latest version of Axe released by Deque, <a rel="nofollow" href="https://github.com/dequelabs/axe-core/releases/tag/v4.2.2">Axe Core 4.2.2</a> which fixes some bugs:</p>
 
* **aria-allowed-attr**: allow `aria-posinset` and `aria-setsize` on row elements for treegrids
* **heading-order**: Prevent crash on page with iframes but no headings
* **meta-viewport**: test that a user-scalable number does not prevent zoom

## Current accessibility ruleset

Check out the full list of accessibility rules that are being checked currently by our web crawler

<a href="https://rocketvalidator.com/accessibility-validation">Accessibility rules checked by Rocket Validator</a>.

## Time to re-check your sites!

<p>As usual, it's recommended to re-check your sites after the validation servers have been upgraded, to get the most up-to-date results. Remember that you can <a href="https://docs.rocketvalidator.com/scheduling/">schedule</a> your reports to run periodically, so you don't have to do that manually every time.</p>