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Yoast SEO 21.9

We've just released Yoast SEO 21.9. This release comes with many behind-the-scenes improvements and general enhancements. Find out more about what's new in Yoast SEO 21.9 in our release post!


  • Adds a filter to add images to the front page in sitemaps.
  • Adds a filter to allow adding images to terms in sitemaps.
  • Clears rewrite rules only for the strip category base option.
  • Removes the clearing of rewrite rules on every option update.
  • Replaces the sitemap rewrite rules mechanism, props to felixarntz.


  • Fixes a bug where a post would be saved when trying to dismiss a notification while editing.
  • Fixes a bug where editing a product would either crash or be slow when there is a high number of registered attributes.
  • Fixes a bug where the Yoast plugin icon in the block editor would not have any horizontal spacing anymore when rendered in "compact" mode.


  • Be explicit about required PHP extensions.
  • Improves PHP 8.2 compatibility.
  • Sets the minimum supported WordPress version to 6.3.
  • Removes the WEBPAGE_HASH constant that had been deprecated in Yoast SEO 19.3 (July 2022).