diff --git a/CHANGELOG.md b/CHANGELOG.md
index 338a78eb9..342b6bd4d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,30 +7,34 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- Nothing yet!
+
+## [4.3.4] - 2026-09-02
+
 ### Added
 
-- Add `@tailwindcss/turbopack` package to run Tailwind CSS with Next.js ([20367](https://github.com/tailwindlabs/tailwindcss/pull/20367))
+- Add `@tailwindcss/turbopack`, a Turbopack loader for using Tailwind CSS with Next.js ([#20367](https://github.com/tailwindlabs/tailwindcss/pull/20367))
 
 ### Fixed
 
 - Ensure watch mode detects changes to symlinked `@source` files whose real paths aren't otherwise scanned ([#20356](https://github.com/tailwindlabs/tailwindcss/pull/20356))
-- Ensure custom variants using `@scope` wrap the generated utilities instead of nesting inside them ([#20369](https://github.com/tailwindlabs/tailwindcss/pull/20369))
-- Fix flattening of `@scope` at-rules ([#20369](https://github.com/tailwindlabs/tailwindcss/pull/20369))
-- Fix standalone declarations in `@scope`, wrap them in `:where(:scope)` ([#20369](https://github.com/tailwindlabs/tailwindcss/pull/20369))
-- Always emit a space for empty fallback values in CSS variables (e.g. `var(--tw-blur,)` → `var(--tw-blur, )`) ([#20373](https://github.com/tailwindlabs/tailwindcss/pull/20373))
-- Canonicalization: convert arbitrary breakpoint and container query variants to named equivalents (e.g. `max-[64rem]` → `max-lg`) ([#20380](https://github.com/tailwindlabs/tailwindcss/pull/20380))
+- Ensure variants using `@scope` wrap generated utilities instead of nesting inside them ([#20369](https://github.com/tailwindlabs/tailwindcss/pull/20369))
+- Ensure nested `@scope` rules preserve their scoping semantics when flattened ([#20369](https://github.com/tailwindlabs/tailwindcss/pull/20369))
+- Preserve declarations directly inside `@scope` by wrapping them in `:where(:scope)` ([#20369](https://github.com/tailwindlabs/tailwindcss/pull/20369))
+- Ensure generated utilities include a space in empty `var()` fallbacks (e.g. `var(--tw-blur,)` → `var(--tw-blur, )`) ([#20373](https://github.com/tailwindlabs/tailwindcss/pull/20373))
+- Canonicalization: convert arbitrary breakpoint and container query variants to named equivalents (e.g. `max-[64rem]:flex` → `max-lg:flex`) ([#20380](https://github.com/tailwindlabs/tailwindcss/pull/20380))
 - Prevent `@tailwindcss/vite` from crashing on every edit under Vite's experimental `bundledDev` mode ([#20379](https://github.com/tailwindlabs/tailwindcss/pull/20379))
 - Ensure `@tailwindcss/oxide` falls back to WASM on platforms without native bindings ([#20383](https://github.com/tailwindlabs/tailwindcss/pull/20383))
-- Detect classes in Ruby percent literals using angle brackets or custom delimiters (e.g. `%w<flex>`, `%w|flex|`), including in Slim and Haml templates ([#20387](https://github.com/tailwindlabs/tailwindcss/pull/20387))
-- Preserve whitespace in `--default(…)` values in custom functional utilities (e.g. `--default(box alphabetic)` no longer becomes `boxalphabetic`) ([#20392](https://github.com/tailwindlabs/tailwindcss/pull/20392))
-- Don't scan gitignored directories (e.g. `node_modules` and `.git`) when the project uses a safelist-style `.gitignore` (e.g. `/*` followed by `!/…` negations) ([#20397](https://github.com/tailwindlabs/tailwindcss/pull/20397))
+- Extract class candidates from Ruby `%w` and `%W` literals using angle brackets or custom delimiters (e.g. `%w<flex>`, `%w|flex|`), including in Slim and Haml templates ([#20387](https://github.com/tailwindlabs/tailwindcss/pull/20387))
+- Preserve whitespace in `--default(…)` values in functional `@utility` definitions (e.g. `--default(box alphabetic)` no longer becomes `boxalphabetic`) ([#20392](https://github.com/tailwindlabs/tailwindcss/pull/20392))
+- Ensure automatic source detection respects negation-based `.gitignore` files (e.g. `/*` followed by `!/…` patterns) ([#20397](https://github.com/tailwindlabs/tailwindcss/pull/20397))
 - Ensure root `theme('…')` namespace lookups in JavaScript plugins and config files return the full namespace object instead of the value of its `DEFAULT` key ([#20399](https://github.com/tailwindlabs/tailwindcss/pull/20399))
-- Skip ignored directories entirely when computing watch globs (`scanner.globs`), instead of walking their full contents on every rebuild ([#20408](https://github.com/tailwindlabs/tailwindcss/pull/20408))
-- Oxide: drop invalid UTF-8 candidates ([#20389](https://github.com/tailwindlabs/tailwindcss/pull/20389))
-- `@tailwindcss/vite` no longer forces a full page reload for external files (e.g.: `.php` files) ([#20414](https://github.com/tailwindlabs/tailwindcss/issues/20414))
+- Skip ignored directories when generating watch globs instead of walking their contents on every rebuild ([#20408](https://github.com/tailwindlabs/tailwindcss/pull/20408))
+- Drop invalid UTF-8 candidates during class detection ([#20389](https://github.com/tailwindlabs/tailwindcss/pull/20389))
+- Prevent `@tailwindcss/vite` from forcing full-page reloads for scanned files that Vite does not handle as modules (e.g. `.php` files) ([#20414](https://github.com/tailwindlabs/tailwindcss/pull/20414))
 - Canonicalization: don't merge utilities that reference different theme variables set to CSS-wide keywords like `unset` ([#20417](https://github.com/tailwindlabs/tailwindcss/pull/20417))
 - Don't generate utilities when a modifier is used that would otherwise be silently ignored (e.g. `rounded-sm/[5]`, `shadow-sm/foo`, `stroke-2/50`) ([#20419](https://github.com/tailwindlabs/tailwindcss/pull/20419))
-- Only normalize top-level `and`, `or`, and `not` keywords in `supports-[…]` variants (e.g. `selector(a: not (.foo))` → `selector(a:not(.foo))`) ([#20420](https://github.com/tailwindlabs/tailwindcss/pull/20420))
+- Preserve `and`, `or`, and `not` inside selectors in `supports-[…]` variants (e.g. `supports-[selector(a:not(.foo))]:flex`) ([#20420](https://github.com/tailwindlabs/tailwindcss/pull/20420))
 - Don't warn about Angular's `::ng-deep` and `:host-context()` when optimizing CSS ([#20434](https://github.com/tailwindlabs/tailwindcss/pull/20434))
 - Don't generate CSS for candidates containing an empty additional modifier (e.g. `bg-red-500/50/` and `group-hover/foo//bar:flex`) ([#20466](https://github.com/tailwindlabs/tailwindcss/pull/20466))
 
@@ -4120,7 +4124,8 @@ No release notes
 
 - Everything!
 
-[unreleased]: https://github.com/tailwindlabs/tailwindcss/compare/v4.3.3...HEAD
+[unreleased]: https://github.com/tailwindlabs/tailwindcss/compare/v4.3.4...HEAD
+[4.3.4]: https://github.com/tailwindlabs/tailwindcss/compare/v4.3.3...v4.3.4
 [4.3.3]: https://github.com/tailwindlabs/tailwindcss/compare/v4.3.2...v4.3.3
 [4.3.2]: https://github.com/tailwindlabs/tailwindcss/compare/v4.3.1...v4.3.2
 [4.3.1]: https://github.com/tailwindlabs/tailwindcss/compare/v4.3.0...v4.3.1
diff --git a/crates/node/npm/android-arm-eabi/package.json b/crates/node/npm/android-arm-eabi/package.json
index d46ceb237..fa1ba6ef4 100644
--- a/crates/node/npm/android-arm-eabi/package.json
+++ b/crates/node/npm/android-arm-eabi/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-android-arm-eabi",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/npm/android-arm64/package.json b/crates/node/npm/android-arm64/package.json
index e6e9d577d..691b65a57 100644
--- a/crates/node/npm/android-arm64/package.json
+++ b/crates/node/npm/android-arm64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-android-arm64",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/npm/darwin-arm64/package.json b/crates/node/npm/darwin-arm64/package.json
index 1cb737c2e..effdd7785 100644
--- a/crates/node/npm/darwin-arm64/package.json
+++ b/crates/node/npm/darwin-arm64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-darwin-arm64",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/npm/darwin-x64/package.json b/crates/node/npm/darwin-x64/package.json
index ffd75e54b..86a95c361 100644
--- a/crates/node/npm/darwin-x64/package.json
+++ b/crates/node/npm/darwin-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-darwin-x64",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/npm/freebsd-x64/package.json b/crates/node/npm/freebsd-x64/package.json
index e248f39d1..e5b19a60f 100644
--- a/crates/node/npm/freebsd-x64/package.json
+++ b/crates/node/npm/freebsd-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-freebsd-x64",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/npm/linux-arm-gnueabihf/package.json b/crates/node/npm/linux-arm-gnueabihf/package.json
index 50d2aef73..77193caf1 100644
--- a/crates/node/npm/linux-arm-gnueabihf/package.json
+++ b/crates/node/npm/linux-arm-gnueabihf/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-linux-arm-gnueabihf",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/npm/linux-arm64-gnu/package.json b/crates/node/npm/linux-arm64-gnu/package.json
index 5875213f8..ffd2c0232 100644
--- a/crates/node/npm/linux-arm64-gnu/package.json
+++ b/crates/node/npm/linux-arm64-gnu/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-linux-arm64-gnu",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/npm/linux-arm64-musl/package.json b/crates/node/npm/linux-arm64-musl/package.json
index 9da37f3fd..21396cded 100644
--- a/crates/node/npm/linux-arm64-musl/package.json
+++ b/crates/node/npm/linux-arm64-musl/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-linux-arm64-musl",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/npm/linux-x64-gnu/package.json b/crates/node/npm/linux-x64-gnu/package.json
index d409743fa..b19c32c7e 100644
--- a/crates/node/npm/linux-x64-gnu/package.json
+++ b/crates/node/npm/linux-x64-gnu/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-linux-x64-gnu",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/npm/linux-x64-musl/package.json b/crates/node/npm/linux-x64-musl/package.json
index 5b404fd70..6881ee939 100644
--- a/crates/node/npm/linux-x64-musl/package.json
+++ b/crates/node/npm/linux-x64-musl/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-linux-x64-musl",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/npm/wasm32-wasi/package.json b/crates/node/npm/wasm32-wasi/package.json
index cee9fb05a..6c2689e4c 100644
--- a/crates/node/npm/wasm32-wasi/package.json
+++ b/crates/node/npm/wasm32-wasi/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-wasm32-wasi",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "main": "tailwindcss-oxide.wasi.cjs",
   "files": [
     "tailwindcss-oxide.wasm32-wasi.wasm",
diff --git a/crates/node/npm/win32-arm64-msvc/package.json b/crates/node/npm/win32-arm64-msvc/package.json
index 991727a32..e4a72f436 100644
--- a/crates/node/npm/win32-arm64-msvc/package.json
+++ b/crates/node/npm/win32-arm64-msvc/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-win32-arm64-msvc",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/npm/win32-x64-msvc/package.json b/crates/node/npm/win32-x64-msvc/package.json
index 82d75c300..e584a12be 100644
--- a/crates/node/npm/win32-x64-msvc/package.json
+++ b/crates/node/npm/win32-x64-msvc/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide-win32-x64-msvc",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/package.json b/crates/node/package.json
index be09427fb..71b429637 100644
--- a/crates/node/package.json
+++ b/crates/node/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/packages/@tailwindcss-browser/package.json b/packages/@tailwindcss-browser/package.json
index 70af78c1e..3c1af403e 100644
--- a/packages/@tailwindcss-browser/package.json
+++ b/packages/@tailwindcss-browser/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/browser",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "description": "A utility-first CSS framework for rapidly building custom user interfaces.",
   "license": "MIT",
   "main": "./dist/index.global.js",
diff --git a/packages/@tailwindcss-cli/package.json b/packages/@tailwindcss-cli/package.json
index 7fa5b5500..f4b40385e 100644
--- a/packages/@tailwindcss-cli/package.json
+++ b/packages/@tailwindcss-cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/cli",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "description": "A utility-first CSS framework for rapidly building custom user interfaces.",
   "license": "MIT",
   "repository": {
diff --git a/packages/@tailwindcss-node/package.json b/packages/@tailwindcss-node/package.json
index 0eced7366..b7b96599c 100644
--- a/packages/@tailwindcss-node/package.json
+++ b/packages/@tailwindcss-node/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/node",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "description": "A utility-first CSS framework for rapidly building custom user interfaces.",
   "license": "MIT",
   "repository": {
diff --git a/packages/@tailwindcss-postcss/package.json b/packages/@tailwindcss-postcss/package.json
index 891578509..0144d0c7d 100644
--- a/packages/@tailwindcss-postcss/package.json
+++ b/packages/@tailwindcss-postcss/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/postcss",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "description": "PostCSS plugin for Tailwind CSS, a utility-first CSS framework for rapidly building custom user interfaces",
   "license": "MIT",
   "repository": {
diff --git a/packages/@tailwindcss-standalone/package.json b/packages/@tailwindcss-standalone/package.json
index 24f8c93c7..0ba215781 100644
--- a/packages/@tailwindcss-standalone/package.json
+++ b/packages/@tailwindcss-standalone/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/standalone",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "private": true,
   "description": "Standalone CLI for Tailwind CSS",
   "license": "MIT",
diff --git a/packages/@tailwindcss-turbopack/package.json b/packages/@tailwindcss-turbopack/package.json
index abdbbe90e..1e8601304 100644
--- a/packages/@tailwindcss-turbopack/package.json
+++ b/packages/@tailwindcss-turbopack/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/turbopack",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "description": "A Turbopack loader for Tailwind CSS v4.",
   "license": "MIT",
   "repository": {
diff --git a/packages/@tailwindcss-upgrade/package.json b/packages/@tailwindcss-upgrade/package.json
index e960d7677..97533500d 100644
--- a/packages/@tailwindcss-upgrade/package.json
+++ b/packages/@tailwindcss-upgrade/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/upgrade",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "description": "A utility-first CSS framework for rapidly building custom user interfaces.",
   "license": "MIT",
   "repository": {
diff --git a/packages/@tailwindcss-vite/package.json b/packages/@tailwindcss-vite/package.json
index 821704a1d..4ed42fb26 100644
--- a/packages/@tailwindcss-vite/package.json
+++ b/packages/@tailwindcss-vite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/vite",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "description": "A utility-first CSS framework for rapidly building custom user interfaces.",
   "license": "MIT",
   "repository": {
diff --git a/packages/@tailwindcss-webpack/package.json b/packages/@tailwindcss-webpack/package.json
index dce09429d..7a01e849a 100644
--- a/packages/@tailwindcss-webpack/package.json
+++ b/packages/@tailwindcss-webpack/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/webpack",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "description": "A webpack loader for Tailwind CSS v4.",
   "license": "MIT",
   "repository": {
diff --git a/packages/tailwindcss/package.json b/packages/tailwindcss/package.json
index d1288d6fa..9a232cb24 100644
--- a/packages/tailwindcss/package.json
+++ b/packages/tailwindcss/package.json
@@ -1,6 +1,6 @@
 {
   "name": "tailwindcss",
-  "version": "4.3.3",
+  "version": "4.3.4",
   "description": "A utility-first CSS framework for rapidly building custom user interfaces.",
   "license": "MIT",
   "repository": {