diff --git a/changelog.txt b/changelog.txt
index fa6231035e9..824059ba875 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,5 +1,153 @@
 == Changelog ==
 
+= 8.4.0 2023-12-12 =
+
+**WooCommerce**
+
+* Fix - Add fullscreen class to body when CYS component is shown [#41056](https://github.com/woocommerce/woocommerce/pull/41056)
+* Fix - Additional improvements to e2e tests to improve reliability [#41345](https://github.com/woocommerce/woocommerce/pull/41345)
+* Fix - Address a problem with searches involving underscore characters in the HPOS. [#41516](https://github.com/woocommerce/woocommerce/pull/41516)
+* Fix - Allow null value in cost field for multichannel campaign. [#41180](https://github.com/woocommerce/woocommerce/pull/41180)
+* Fix - A number of fixes for e2e tests [#41315](https://github.com/woocommerce/woocommerce/pull/41315)
+* Fix - Avoid the PHP error with an undefined property on the WooCommerce > Extensions page. [#41125](https://github.com/woocommerce/woocommerce/pull/41125)
+* Fix - Correct return type of ProductFormTemplateInterface::add_group() method. [#41595](https://github.com/woocommerce/woocommerce/pull/41595)
+* Fix - Ensure some wpdb properties exist before accessing them. [#41269](https://github.com/woocommerce/woocommerce/pull/41269)
+* Fix - Fix "Choose Your Theme" task header [#41293](https://github.com/woocommerce/woocommerce/pull/41293)
+* Fix - Fix blank assember hub (CYS) issue on WP 6.3 + latest Gutenberg. [#41052](https://github.com/woocommerce/woocommerce/pull/41052)
+* Fix - Fix call to undefined function on Marketplace page registration. [#41395](https://github.com/woocommerce/woocommerce/pull/41395)
+* Fix - Fix currency breaking lines when 2 or more characters [#41548](https://github.com/woocommerce/woocommerce/pull/41548)
+* Fix - Fix cys ai api hanging and validation error [#41424](https://github.com/woocommerce/woocommerce/pull/41424)
+* Fix - Fix CYS assembler hub UI issues [#41036](https://github.com/woocommerce/woocommerce/pull/41036)
+* Fix - Fix cys frame overlap the sidebar [#41237](https://github.com/woocommerce/woocommerce/pull/41237)
+* Fix - Fix CYS initial pattern population bug [#41233](https://github.com/woocommerce/woocommerce/pull/41233)
+* Fix - Fix cys intro page button styles [#41118](https://github.com/woocommerce/woocommerce/pull/41118)
+* Fix - Fix cys pattern thumbnail size [#41126](https://github.com/woocommerce/woocommerce/pull/41126)
+* Fix - Fix CYS Spotlight Tour caret is not centered vertically [#41154](https://github.com/woocommerce/woocommerce/pull/41154)
+* Fix - Fix cys ui issues [#41209](https://github.com/woocommerce/woocommerce/pull/41209)
+* Fix - Fix default width for logo [#41080](https://github.com/woocommerce/woocommerce/pull/41080)
+* Fix - Fixed warning on wc_get_product_variation_attributes when product does not exist [#32288](https://github.com/woocommerce/woocommerce/pull/32288)
+* Fix - Fixes daily execution workflow for API and e2e tests [#41113](https://github.com/woocommerce/woocommerce/pull/41113)
+* Fix - Fix for PR tests and daily tests [#41203](https://github.com/woocommerce/woocommerce/pull/41203)
+* Fix - Fix intro warning modal copy and button spacing [#41082](https://github.com/woocommerce/woocommerce/pull/41082)
+* Fix - fix legacy order data PHP 8 compatibility issue [#41094](https://github.com/woocommerce/woocommerce/pull/41094)
+* Fix - Fix marketing campaign link not navigating to the right page. [#41182](https://github.com/woocommerce/woocommerce/pull/41182)
+* Fix - Fix navigation disappears after choosing a homepage template [#41262](https://github.com/woocommerce/woocommerce/pull/41262)
+* Fix - Fix pushstate event in CYS not called in iframe [#41079](https://github.com/woocommerce/woocommerce/pull/41079)
+* Fix - Fix save button is still disabled after updating logo settings [#41208](https://github.com/woocommerce/woocommerce/pull/41208)
+* Fix - Fix snackbar notice icon position. [#41399](https://github.com/woocommerce/woocommerce/pull/41399)
+* Fix - Fix the slides overlapping on the Marketing > Coupon page. [#41155](https://github.com/woocommerce/woocommerce/pull/41155)
+* Fix - Fix the “Preview” on the transnational screen doesn’t represent our custom color palette [#41496](https://github.com/woocommerce/woocommerce/pull/41496)
+* Fix - Fix Undefined array key "queryId" error [#41083](https://github.com/woocommerce/woocommerce/pull/41083)
+* Fix - Fix unintended spacing in CYS transition page's iframe [#41162](https://github.com/woocommerce/woocommerce/pull/41162)
+* Fix - Fix `TypeError` in `WC_Discounts->apply_coupons()` when being called a second time. [#41602](https://github.com/woocommerce/woocommerce/pull/41602)
+* Fix - Ignore '_completed_date' in HPOS verification tool. [#41547](https://github.com/woocommerce/woocommerce/pull/41547)
+* Fix - Import variations count fails when importing more than 30 products [#41187](https://github.com/woocommerce/woocommerce/pull/41187)
+* Fix - Improve compatibility of legacy WooCommerce shortcodes with the block editor. [#40648](https://github.com/woocommerce/woocommerce/pull/40648)
+* Fix - Prevent a fatal error that could occur if you submitted the bulk edit form on the Logs list table without selecting any log files first. [#41201](https://github.com/woocommerce/woocommerce/pull/41201)
+* Fix - Prevent PHP warning when order lock is released during page load. [#41278](https://github.com/woocommerce/woocommerce/pull/41278)
+* Fix - Prevent possible notice during plugin activation. [#41434](https://github.com/woocommerce/woocommerce/pull/41434)
+* Fix - Reduce the possibility of errors if the global `$post` object has been set to an unexpected value.
+* Fix - Removed hardcoded colors from the base stylesheet when a block theme is used [#41366](https://github.com/woocommerce/woocommerce/pull/41366)
+* Fix - Remove iframe scrollbar when viewing CYS intro iframe [#41156](https://github.com/woocommerce/woocommerce/pull/41156)
+* Fix - Render customer filter on HPOS orders on hook execution for backwards compat. [#41328](https://github.com/woocommerce/woocommerce/pull/41328)
+* Fix - Restore screen options functionality on HPOS edit screen. [#41047](https://github.com/woocommerce/woocommerce/pull/41047)
+* Fix - Update state definitions for Liechtenstein and Chile [#41068](https://github.com/woocommerce/woocommerce/pull/41068)
+* Fix - Use consistent sanitization when saving tax classes. [#41220](https://github.com/woocommerce/woocommerce/pull/41220)
+* Add - Add a new single file view to the Logs screen for viewing the contents of a log file. [#41114](https://github.com/woocommerce/woocommerce/pull/41114)
+* Add - Add API to allow adding disable conditions [#41307](https://github.com/woocommerce/woocommerce/pull/41307)
+* Add - Add a unit test to ensure that the payment gateway suggestion cache is refreshed when the base country is updated [#41412](https://github.com/woocommerce/woocommerce/pull/41412)
+* Add - Add a view to the Logs screen for browsing log files. [#40662](https://github.com/woocommerce/woocommerce/pull/40662)
+* Add - Add a `store_id` to WC Tracker snapshots and Tracks events. [#40705](https://github.com/woocommerce/woocommerce/pull/40705)
+* Add - Add cys ai survey [#41234](https://github.com/woocommerce/woocommerce/pull/41234)
+* Add - Add digital products to the new A/B test of the product editor. [#41469](https://github.com/woocommerce/woocommerce/pull/41469)
+* Add - Add documentation on block template lifecycle. [#40980](https://github.com/woocommerce/woocommerce/pull/40980)
+* Add - Added envia plugin slug to shipping task [#41539](https://github.com/woocommerce/woocommerce/pull/41539)
+* Add - Add iframe view for CYS intro screen [#41130](https://github.com/woocommerce/woocommerce/pull/41130)
+* Add - Add more track events for cys [#41321](https://github.com/woocommerce/woocommerce/pull/41321)
+* Add - Add slotfill for cys transitiona page secondary button [#41153](https://github.com/woocommerce/woocommerce/pull/41153)
+* Add - Adds new filters to customize the behavior of the cart shipping calculator. [#41146](https://github.com/woocommerce/woocommerce/pull/41146)
+* Add - Add support for external/affiliate products [#41442](https://github.com/woocommerce/woocommerce/pull/41442)
+* Add - Add support to filter variations by many attribute options [#40978](https://github.com/woocommerce/woocommerce/pull/40978)
+* Add - Add the possibility to remove the logo [#41393](https://github.com/woocommerce/woocommerce/pull/41393)
+* Add - Add tracks for cys [#41284](https://github.com/woocommerce/woocommerce/pull/41284)
+* Add - CYS - Add AI disclaimer copy [#41414](https://github.com/woocommerce/woocommerce/pull/41414)
+* Add - Hide track stock quantity toogle when the product type is external [#41520](https://github.com/woocommerce/woocommerce/pull/41520)
+* Add - Includes the store_id added by #40705 to the system_status REST API. [#41341](https://github.com/woocommerce/woocommerce/pull/41341)
+* Add - Introduce a remote inbox rule for Woo Express sites [#40513](https://github.com/woocommerce/woocommerce/pull/40513)
+* Add - Modified business info placeholder text on CYS AI Wizard [#41532](https://github.com/woocommerce/woocommerce/pull/41532)
+* Add - Removed experimental code for email marketing opt in [#41599](https://github.com/woocommerce/woocommerce/pull/41599)
+* Add - Revert adding Envia slug [#41624](https://github.com/woocommerce/woocommerce/pull/41624)
+* Add - Show notice when clicking this back arrow in CYS assembler-hub [#41259](https://github.com/woocommerce/woocommerce/pull/41259)
+* Add - Show virtual and downloadable features in simple product and variations only [#41331](https://github.com/woocommerce/woocommerce/pull/41331)
+* Add - [Product Blocks editor]: add tooltip help to Organization/Product catalog and Attributes [#41644](https://github.com/woocommerce/woocommerce/pull/41644)
+* Update - Add more loaders to cys loading screen [#41148](https://github.com/woocommerce/woocommerce/pull/41148)
+* Update - Add stalebot schedules to allow processing of all issues [#41198](https://github.com/woocommerce/woocommerce/pull/41198)
+* Update - Add to cart button aria-label text should match or use similar text pattern as the visible text [#41389](https://github.com/woocommerce/woocommerce/pull/41389)
+* Update - bump action/stale version, increase operations per run [#41139](https://github.com/woocommerce/woocommerce/pull/41139)
+* Update - Change the max permited generated variations to 99 [#41008](https://github.com/woocommerce/woocommerce/pull/41008)
+* Update - Hide CYS feedback button when survey has already been completed [#41352](https://github.com/woocommerce/woocommerce/pull/41352)
+* Update - Improve block template API logging. [#41316](https://github.com/woocommerce/woocommerce/pull/41316)
+* Update - Reduce the logo preview to a maximum width of 60px [#41122](https://github.com/woocommerce/woocommerce/pull/41122)
+* Update - Remove AI requests from the CYS business description step [#41497](https://github.com/woocommerce/woocommerce/pull/41497)
+* Update - Remove Codisto from the default free extensions for onboarding wizard and task list. [#41499](https://github.com/woocommerce/woocommerce/pull/41499)
+* Update - Remove Creative Mail for WooCommerce from recommended. [#40991](https://github.com/woocommerce/woocommerce/pull/40991)
+* Update - Remove unused banner image in customize store task. [#41244](https://github.com/woocommerce/woocommerce/pull/41244)
+* Update - Rename the reference to the 'Footer with Simple Menu and Cart' pattern [#41181](https://github.com/woocommerce/woocommerce/pull/41181)
+* Update - Replace the **Just Arrived Full Hero** pattern with the **Hero Product Split** in the CYS flow [#41109](https://github.com/woocommerce/woocommerce/pull/41109)
+* Update - revert stalebot to v8 and single run [#41528](https://github.com/woocommerce/woocommerce/pull/41528)
+* Update - The WooCommerce > Extensions section now includes a rebuilt "My Subscriptions" page with improvements to how subscriptions can be managed and installed. [#40249](https://github.com/woocommerce/woocommerce/pull/40249)
+* Update - Throw exception if order data storage change is attempted while there are orders pending sync, and add the wc_allow_changing_orders_storage_while_sync_is_pending filter to bypass this [#39988](https://github.com/woocommerce/woocommerce/pull/39988)
+* Update - Update Action Scheduler to 3.7.0 [#41576](https://github.com/woocommerce/woocommerce/pull/41576)
+* Update - Update copy for CYS [#41235](https://github.com/woocommerce/woocommerce/pull/41235)
+* Update - Update cys color/font choices [#40989](https://github.com/woocommerce/woocommerce/pull/40989)
+* Update - update list of CSV characters to prepend with a tick when occurring at the beginning of a cell [#41464](https://github.com/woocommerce/woocommerce/pull/41464)
+* Update - Update product editor default block order to 10000 [#41100](https://github.com/woocommerce/woocommerce/pull/41100)
+* Update - update references to woocommerce.com to now reference woo.com [#41241](https://github.com/woocommerce/woocommerce/pull/41241)
+* Update - Update Shipping Settings to new experience. [#40983](https://github.com/woocommerce/woocommerce/pull/40983)
+* Update - Updates the OnboardingThemes->get_recommended_themes() method to check the filtered response to see if any of the themes are active. [#40981](https://github.com/woocommerce/woocommerce/pull/40981)
+* Update - Update the CYS Design with AI loading iframes [#41123](https://github.com/woocommerce/woocommerce/pull/41123)
+* Update - update woocommerce.com email addresses to woo.com [#41245](https://github.com/woocommerce/woocommerce/pull/41245)
+* Update - Update WooCommerce Blocks to 11.4.3 [#41134](https://github.com/woocommerce/woocommerce/pull/41134)
+* Update - Update WooCommerce Blocks to 11.5.3 [#41269](https://github.com/woocommerce/woocommerce/pull/41269)
+* Update - Update WooCommerce Blocks to 11.5.4 [#41403](https://github.com/woocommerce/woocommerce/pull/41403)
+* Update - Update WooCommerce Blocks to 11.6.0 [#41641](https://github.com/woocommerce/woocommerce/pull/41641)
+* Update - use latest commit of stalebot action, tweak configuration accordingly [#41305](https://github.com/woocommerce/woocommerce/pull/41305)
+* Dev - Update WooCommerce Core WP.org product page readme. [#41660](https://github.com/woocommerce/woocommerce/pull/41660)
+* Dev - Add one more scenario to cover taxing [#41064](https://github.com/woocommerce/woocommerce/pull/41064)
+* Dev - Adds e2e tests for a number of Analytics screens [#40504](https://github.com/woocommerce/woocommerce/pull/40504)
+* Dev - Adds e2e tests for tax display in store, cart and checkout [#40178](https://github.com/woocommerce/woocommerce/pull/40178)
+* Dev - Adds tests for shopper cart block flows [#40522](https://github.com/woocommerce/woocommerce/pull/40522)
+* Dev - Fixed all violations of no-use-before-define eslint rule [#41452](https://github.com/woocommerce/woocommerce/pull/41452)
+* Dev - Fixed some i18n related lint rule violations. [#41450](https://github.com/woocommerce/woocommerce/pull/41450)
+* Dev - Update plugin name in testing workflows to "Woo Subscriptions". [#40460](https://github.com/woocommerce/woocommerce/pull/40460)
+* Dev - Update to allow the api-core-tests to execute against the daily test site [#41222](https://github.com/woocommerce/woocommerce/pull/41222)
+* Dev - Update variations message to include missing downloads section #41581 [#41581](https://github.com/woocommerce/woocommerce/pull/41581)
+* Dev - Use iframe to improve assembler hub loading time perception [#40936](https://github.com/woocommerce/woocommerce/pull/40936)
+* Tweak - Add flags to control visibility of  Header, StoreAlerts, Notices, and PluginArea components at the page configuration level. [#41014](https://github.com/woocommerce/woocommerce/pull/41014)
+* Tweak - CYS - Hide theme and default palettes on the assember hub page. [#41103](https://github.com/woocommerce/woocommerce/pull/41103)
+* Tweak - Fix intro page banner style [#41458](https://github.com/woocommerce/woocommerce/pull/41458)
+* Tweak - Fix typographic quotes mistakenly added to HTML attributes [#41320](https://github.com/woocommerce/woocommerce/pull/41320)
+* Tweak - Move Template implementation classes to internal namespace [#41170](https://github.com/woocommerce/woocommerce/pull/41170)
+* Tweak - Remove disproportionate spacing above and below logo [#41151](https://github.com/woocommerce/woocommerce/pull/41151)
+* Tweak - Rename the Centered Header Menu with Search pattern to Centered Header Menu. [#41252](https://github.com/woocommerce/woocommerce/pull/41252)
+* Tweak - Tweak "Drag to resize" styling when spotlight tour is present [#41150](https://github.com/woocommerce/woocommerce/pull/41150)
+* Tweak - Update / tweak a few more links in docs and comments. [#41598](https://github.com/woocommerce/woocommerce/pull/41598)
+* Tweak - Update pattern assembler thumbnail shadow [#41157](https://github.com/woocommerce/woocommerce/pull/41157)
+* Tweak - Update the CYS task API loader smoother [#41279](https://github.com/woocommerce/woocommerce/pull/41279)
+* Tweak - [Product blocks editor]: Add help text to Shipping toggle [#41590](https://github.com/woocommerce/woocommerce/pull/41590)
+* Performance - Avoid expensive DB orders queries in WP admin pages when evaluating incentives eligibility. [#41466](https://github.com/woocommerce/woocommerce/pull/41466)
+* Performance - Improve CYS assembler hub performance [#41453](https://github.com/woocommerce/woocommerce/pull/41453)
+* Performance - Only generate product editor templates on WCA routes. [#41410](https://github.com/woocommerce/woocommerce/pull/41410)
+* Performance - Preload fonts in preview iframe [#41421](https://github.com/woocommerce/woocommerce/pull/41421)
+* Performance - Reduce cys intro page loading time [#41017](https://github.com/woocommerce/woocommerce/pull/41017)
+* Performance - Remove use SQL_CALC_FOUND_ROWS from the query. SQL_CALC_FOUND_ROWS can cause inconsistent performance depending on the # of rows or DB version. [#40289](https://github.com/woocommerce/woocommerce/pull/40289)
+* Performance - use multiple endpoints to improve performance [#41168](https://github.com/woocommerce/woocommerce/pull/41168)
+* Enhancement - - Enhancement: Style `<mark>` tag on order detail page [#41323](https://github.com/woocommerce/woocommerce/pull/41323)
+* Enhancement - Added a new parameter $status_transition to the woocommerce_order_status_$status_transition["to"] hook. [#41051](https://github.com/woocommerce/woocommerce/pull/41051)
+* Enhancement - Adds filter `woocommerce_order_received_verify_known_shoppers` to allow known shoppers to access the order received page without being logged in. [#41347](https://github.com/woocommerce/woocommerce/pull/41347)
+* Enhancement - Check if $data['billing_email'] is set in the create_order function. [#41098](https://github.com/woocommerce/woocommerce/pull/41098)
+
+
 = 8.3.1 2023-11-21 =
 
 **WooCommerce**