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Servebolt Optimizer · Version history

Servebolt Optimizer changelog and version history

Latest version
3.6.4
Jun 23, 2026 (4 months ago)
Releases
105
since 2018
In the last year
4
about one every 41 days
Tested up to
WordPress 7.0.8
PHP 7.4 or later

Releases each year

  • 201819 releases
  • 202017 releases
  • 20217 releases
  • 202211 releases
  • 202315 releases
  • 202421 releases
  • 202511 releases
  • 20264 releases

20264 releases

  1. Servebolt Optimizer 3.6.4Latest

    • Prepend /bin/bash on commands that executes .sh script when adding as a Cron Job. This is to ensure bash is the shell script interpreter.
    • wp-cli command ‘servebolt html-cache’ now supports JSON output
    • Remove optimized table indexes on uninstall
    • Default “Fast static 404” and “Caching of 404 pages” to false
    • Prevent scripts and styles on the Admin Bar if less than an Editor

  2. Servebolt Optimizer 3.6.3

    • Further improvements on WooCommerce limited purge featured added in 3.6.2. There is now options to limit Cache tag purging for Shop Page, Post archives, Product categories, Term, and other public taxonomy pages

  3. Servebolt Optimizer 3.6.2

    • New (Accelerated Domains): Introduced “WooCommerce homepage purge” in Cache → Cache Settings (disabled by default). Automatically purges the homepage only on product create, delete, or out-of-stock events.

  4. Servebolt Optimizer 3.6.1

    • Variable Edge Caching (Requires Accelerated Domains) We’ve introduced support for Vary Headers Caching, unlocking smarter edge caching with Accelerated Domains. It allows cache separation at the edge based on specific request headers, enabling personalized content delivery without sacrificing cache…
    • Browser Language (Accept-Language) Serves the correct language version based on the visitor’s primary browser setting.
    • Visitor Country (X-Origin-Country) Enables country-specific content, pricing, or campaigns — fully cached at the edge.
    • These variations can be enabled individually or combined, depending on your site’s needs. New: Purge PHP OPcache Button Added a dedicated “Purge PHP OPcache” button directly in the WordPress admin. This allows you to clear PHP OPcache instantly without SSH access or manual intervention — making dep…

202511 releases

  1. Servebolt Optimizer 3.5.59

    • Bugfix: clear-site-data header should now always be sent no matter the browser type
    • Bugfix: Menu Optimizer – Added a guard so the cache-indicator comment isn’t appended when the cached payload isn’t a plain string or is already serialized, preventing Timber’s unserialize() warning etc.

  2. Servebolt Optimizer 3.5.58

    • Error Log Viewer: Grouped errors with a smart, tabbed PHP/HTTP overview. Automatic level selection (Fatal → Error → All), level chips with counters, strict 2,500-line scan, and pagination options (100/250/500). Enhanced support for Servebolt Linux 8 log format, a subtle “Copy full error + trace” li…

  3. Servebolt Optimizer 3.5.57

    • Bugfix: fixed slow cache clear on chrome browsers, and enabled cache clear on firefox correctly
    • New Feature: Option for cloudflare direct communicaitons to work with Cache-Tags for purging. This enhances perfomance of those that have a cloudflare plan on Servebolt.

  4. Servebolt Optimizer 3.5.56

    • Bugfix: fixed malformed http response headers when selecting 0 seconds for specific post type cache TTL for Accelerated Domains.

  5. Servebolt Optimizer 3.5.55

    • Confirmed WordPress 6.7.2 compatibility
    • cleaned off the tail of the readme file

  6. Servebolt Optimizer 3.5.54

    • Added the ability to allow for Private post types to be purged.
    • Bugfix: fixed deprecation errors on PHP 8.4 for nullable types

  7. Servebolt Optimizer 3.5.53

    • Bugfix: Prevent additional db writes to options table on Admin pages by skipping them when the db migration version is the current migration version.

  8. Servebolt Optimizer 3.5.52

    • Added more image sizes to Image Resizer for Accelerated Domains. This overcomes image quality issues on sites that have minimal SRCSET image sizes implemented.

  9. Servebolt Optimizer 3.5.51

    • Added purge all on Customizer Update and Theme change.
    • Added error messaging for when the ‘post_row_actions’ actions array is invalid, and Servebolt Optmizer is unable to add purge actions to CRUD pages.
    • Bugfix: Updated Servebolt PHP-SDK so that the error “PHP Deprecated: Creation of dynamic property” does not show for PHP8.2+

  10. Servebolt Optimizer 3.5.50

    • Bugfix: added extra error checking around WooCommerce product purge after customer reported errors were found.
    • Confirmed WordPress 6.7.1 support

  11. Servebolt Optimizer 3.5.49

    • Added purge on WooCommerce stock change or product update, to cover purge events when save_post hook is not fired.
    • Bugfix: Forcing max-age=0 on all posts that are status “Password Protected” to prevent ever being cached.

202421 releases

  1. Servebolt Optimizer 3.5.48

    • Bugfix: on Servebolt Linux 8/php 8.3+ the purge candidate urls were filtering too many out of being purgable.
    • Bugfix: False positive error in logs when logged in at that Cache-Tag headers could not be sent. Cache-Tags should never be present for logged in users.

  2. Servebolt Optimizer 3.5.47

    • Added option to purge all caches, including the Server and CDN. This applies to those hosted on Servebolt Linux 8 only and using Accelerated Domains or Servebolt CDN.
    • Fixed some deprecation errors on admin sub menus that have been converted to tabs.
    • Improved the log file ready on Servebolt Linux 8 to now include PHP and HTTP.
    • Update to the Servebolt PHP-SDK to support the new purge method.

  3. Servebolt Optimizer 3.5.46

    • Accelerated Domains Image Resizer: added filter to manage problems when WordPress is unable to produce image dimensions by defaulting to the thumbnail size.
    • code re-orgainisation for easier reading/debugging in the purge post section.

  4. Servebolt Optimizer 3.5.45

    • added extra checks to CacheTag creation to deal with plugins that prevent the ID from being readable on is_singular() queries

  5. Servebolt Optimizer 3.5.44

    • added extra checks to prevent php 8.3 deprecation errors on some requests.

  6. Servebolt Optimizer 3.5.43

    • Removed unneeded url purge request for Servebolt-CDN, reducing purge request by 50%.
    • Adapted purge logic for Servebolt-CDN to reduce unneded purges at the CDN. If less than 17 urls are needed to purge properly, it will choose that, if not will purge by tag all HTML.
    • Adapted API error output from code based failures during AJAX request to make it reable.

  7. Servebolt Optimizer 3.5.42

    • forcing release. 45mins after success message from WordPress and its not live. bumping.

  8. Servebolt Optimizer 3.5.41

    • further improvement to purging, reducing total payloads for Files as Tags are performing the same job
    • Bug fix: Updated the PHP SDK again, added type to all Servebolt CDN purges to add extra validation.

  9. Servebolt Optimizer 3.5.40

    • Added stable tag so it gets deployed!
    • Removed changelog pre v 3.5 to make it shorter as requested
    • Adapted the tags to match requested count.

  10. Servebolt Optimizer 3.5.39

    • Added sanitization to host calls for purging, and better validation, via update to Servebolt SDK.
    • Made purge based AJAX error messages readable in the modal window.
    • Reduced number of cache tags, removing ones that were never used.
    • Adapted purge call for Servebolt CDN for single post purges, no more purge errors.

  11. Servebolt Optimizer 3.5.38

  12. Servebolt Optimizer 3.5.37

  13. Servebolt Optimizer 3.5.34

  14. Servebolt Optimizer 3.5.33

  15. Servebolt Optimizer 3.5.32

  16. Servebolt Optimizer 3.5.31

  17. Servebolt Optimizer 3.5.30

  18. Servebolt Optimizer 3.5.29

  19. Servebolt Optimizer 3.5.28

  20. Servebolt Optimizer 3.5.27

  21. Servebolt Optimizer 3.5.26

202315 releases

  1. Servebolt Optimizer 3.5.25

  2. Servebolt Optimizer 5.3.24

  3. Servebolt Optimizer 3.5.23

  4. Servebolt Optimizer 3.5.22

  5. Servebolt Optimizer 3.5.21

  6. Servebolt Optimizer 3.5.20

  7. Servebolt Optimizer 3.5.19

  8. Servebolt Optimizer 3.5.18

  9. Servebolt Optimizer 3.5.17

  10. Servebolt Optimizer 3.5.16

  11. Servebolt Optimizer 3.5.15

  12. Servebolt Optimizer 3.5.14

  13. Servebolt Optimizer 3.5.13

  14. Servebolt Optimizer 3.5.12

  15. Servebolt Optimizer 3.5.11

202211 releases

  1. Servebolt Optimizer 3.5.10

  2. Servebolt Optimizer 3.5.9

  3. Servebolt Optimizer 3.5.8

  4. Servebolt Optimizer 3.5.7

  5. Servebolt Optimizer 3.5.6

  6. Servebolt Optimizer 3.5.5

  7. Servebolt Optimizer 3.5.4

  8. Servebolt Optimizer 3.5.3

  9. Servebolt Optimizer 3.5.2

  10. Servebolt Optimizer 3.5.1

  11. Servebolt Optimizer 3.5

20217 releases

  1. Servebolt Optimizer 3.3

  2. Servebolt Optimizer 3.2

  3. Servebolt Optimizer 3.1.1

  4. Servebolt Optimizer 3.1

  5. Servebolt Optimizer 3.0.2

  6. Servebolt Optimizer 3.0.1

  7. Servebolt Optimizer 3.0.0

202017 releases

  1. Servebolt Optimizer 2.1.5

  2. Servebolt Optimizer 2.1.4

  3. Servebolt Optimizer 2.1.3

  4. Servebolt Optimizer 2.1.2

  5. Servebolt Optimizer 2.1.1

  6. Servebolt Optimizer 2.1

  7. Servebolt Optimizer 2.0.9

  8. Servebolt Optimizer 2.0.8

  9. Servebolt Optimizer 2.0.7

  10. Servebolt Optimizer 2.0.6

  11. Servebolt Optimizer 2.0.5

  12. Servebolt Optimizer 2.0.4

  13. Servebolt Optimizer 2.0.3

  14. Servebolt Optimizer 2.0.2

  15. Servebolt Optimizer 2.0.1

  16. Servebolt Optimizer 2.0

  17. Servebolt Optimizer 1.6.4

201819 releases

  1. Servebolt Optimizer 1.6.3

  2. Servebolt Optimizer 1.6.2

  3. Servebolt Optimizer 1.6.1

  4. Servebolt Optimizer 1.6

  5. Servebolt Optimizer 1.5.1

  6. Servebolt Optimizer 1.5.0

  7. Servebolt Optimizer 1.5

  8. Servebolt Optimizer 1.4.3

  9. Servebolt Optimizer 1.4.2

  10. Servebolt Optimizer 1.4.1

  11. Servebolt Optimizer 1.4

  12. Servebolt Optimizer 1.3.4

  13. Servebolt Optimizer 1.3.3

  14. Servebolt Optimizer 1.3.2

  15. Servebolt Optimizer 1.3.1

  16. Servebolt Optimizer 1.2.3

  17. Servebolt Optimizer 1.2.2

  18. Servebolt Optimizer 1.2.1

  19. Servebolt Optimizer 1.2

Questions about Servebolt Optimizer’s releases

What is the latest version of Servebolt Optimizer?

3.6.4, released on Jun 23, 2026 (4 months ago). It’s tested up to WordPress 7.0.8 and needs PHP 7.4 or later.

How often is Servebolt Optimizer updated?

4 releases in the last year, about one every 41 days. Its first release on WordPress.org dates from January 2018.

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Release dates come from the day each version’s folder was made in Servebolt Optimizer’s WordPress.org SVN repository; the notes from its readme’s changelog, as its authors wrote it.