diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0b6d52c37..7103f059c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,41 @@
 
 All notable changes to this project will be documented in this file.
 
+## [4.3.4] - 2025-02-27
+
+### Security
+
+- Update dependencies
+- Change HTML sanitization to remove unusable and unused `embed` tag (#34021 by @ClearlyClaire, [GHSA-mq2m-hr29-8gqf](https://github.com/mastodon/mastodon/security/advisories/GHSA-mq2m-hr29-8gqf))
+- Fix rate-limit on sign-up email verification ([GHSA-v39f-c9jj-8w7h](https://github.com/mastodon/mastodon/security/advisories/GHSA-v39f-c9jj-8w7h))
+- Fix improper disclosure of domain blocks to unverified users ([GHSA-94h4-fj37-c825](https://github.com/mastodon/mastodon/security/advisories/GHSA-94h4-fj37-c825))
+
+### Changed
+
+- Change preview cards to be shown when Content Warnings are expanded (#33827 by @ClearlyClaire)
+- Change warnings against changing encryption secrets to be even more noticeable (#33631 by @ClearlyClaire)
+- Change `mastodon:setup` to prevent overwriting already-configured servers (#33603, #33616, and #33684 by @ClearlyClaire and @mjankowski)
+- Change notifications from moderators to not be filtered (#32974 and #33654 by @ClearlyClaire and @mjankowski)
+
+### Fixed
+
+- Fix `GET /api/v2/notifications/:id` and `POST /api/v2/notifications/:id/dismiss` for ungrouped notifications (#33990 by @ClearlyClaire)
+- Fix issue with some versions of libvips on some systems (#33853 by @kleisauke)
+- Fix handling of duplicate mentions in incoming status `Update` (#33911 by @ClearlyClaire)
+- Fix inefficiencies in timeline generation (#33839 and #33842 by @ClearlyClaire)
+- Fix emoji rewrite adding unnecessary curft to the DOM for most emoji (#33818 by @ClearlyClaire)
+- Fix `tootctl feeds build` not building list timelines (#33783 by @ClearlyClaire)
+- Fix flaky test in `/api/v2/notifications` tests (#33773 by @ClearlyClaire)
+- Fix incorrect signature after HTTP redirect (#33757 and #33769 by @ClearlyClaire)
+- Fix polls not being validated on edition (#33755 by @ClearlyClaire)
+- Fix media preview height in compose form when 3 or more images are attached (#33571 by @ClearlyClaire)
+- Fix preview card sizing in “Author attribution” in profile settings (#33482 by @ClearlyClaire)
+- Fix processing of incoming notifications for unfilterable types (#33429 by @ClearlyClaire)
+- Fix featured tags for remote accounts not being kept up to date (#33372, #33406, and #33425 by @ClearlyClaire and @mjankowski)
+- Fix notification polling showing a loading bar in web UI (#32960 by @Gargron)
+- Fix accounts table long display name (#29316 by @WebCoder49)
+- Fix exclusive lists interfering with notifications (#28162 by @ShadowJonathan)
+
 ## [4.3.3] - 2025-01-16
 
 ### Security
diff --git a/lib/mastodon/version.rb b/lib/mastodon/version.rb
index 05e053296..7d77328e2 100644
--- a/lib/mastodon/version.rb
+++ b/lib/mastodon/version.rb
@@ -13,7 +13,7 @@ module Mastodon
     end
 
     def patch
-      3
+      4
     end
 
     def default_prerelease