diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0863058bffb0..91cafb4d40ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,16 +13,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - _Experimental_: Add `user-valid` and `user-invalid` variants ([#12370](https://github.com/tailwindlabs/tailwindcss/pull/12370))
 - _Experimental_: Add `wrap-anywhere`, `wrap-break-word`, and `wrap-normal` utilities ([#12128](https://github.com/tailwindlabs/tailwindcss/pull/12128))
 
+## [4.0.9] - 2025-02-25
+
 ### Fixed
 
 - Make JS APIs available to plugins and configs in the Standalone CLI ([#15934](https://github.com/tailwindlabs/tailwindcss/pull/15934))
-- Vite: Don't crash when importing a virtual module in JavaScript that ends in `.css` ([#16780](https://github.com/tailwindlabs/tailwindcss/pull/16780))
-- Ensure `@reference "…"` does not emit CSS variables ([#16774](https://github.com/tailwindlabs/tailwindcss/pull/16774))
+- Vite: Don't crash when importing a virtual module from JavaScript that ends in `.css` ([#16780](https://github.com/tailwindlabs/tailwindcss/pull/16780))
 - Fix an issue where `@reference "…"` would sometimes omit keyframe animations ([#16774](https://github.com/tailwindlabs/tailwindcss/pull/16774))
-- Ensure `z-*!` utilities are property marked as `!important` ([#16795](https://github.com/tailwindlabs/tailwindcss/pull/16795))
+- Ensure `z-*!` utilities are properly marked as `!important` ([#16795](https://github.com/tailwindlabs/tailwindcss/pull/16795))
 - Read UTF-8 CSS files that start with a byte-order mark (BOM) ([#16796](https://github.com/tailwindlabs/tailwindcss/pull/16796))
 - Ensure nested functions in selectors used with JavaScript plugins are not truncated ([#16802](https://github.com/tailwindlabs/tailwindcss/pull/16802))
 
+### Changed
+
+- Emit variable fallbacks when using `@reference "…"` instead of duplicate CSS variable declarations ([#16774](https://github.com/tailwindlabs/tailwindcss/pull/16774))
+
 ## [4.0.8] - 2025-02-21
 
 ### Added
@@ -3464,7 +3469,8 @@ No release notes
 
 - Everything!
 
-[unreleased]: https://github.com/tailwindlabs/tailwindcss/compare/v4.0.8...HEAD
+[unreleased]: https://github.com/tailwindlabs/tailwindcss/compare/v4.0.9...HEAD
+[4.0.9]: https://github.com/tailwindlabs/tailwindcss/compare/v4.0.8...v4.0.9
 [4.0.8]: https://github.com/tailwindlabs/tailwindcss/compare/v4.0.7...v4.0.8
 [4.0.7]: https://github.com/tailwindlabs/tailwindcss/compare/v4.0.6...v4.0.7
 [4.0.6]: https://github.com/tailwindlabs/tailwindcss/compare/v4.0.5...v4.0.6
diff --git a/crates/node/npm/android-arm-eabi/package.json b/crates/node/npm/android-arm-eabi/package.json
index 6c9b0bba2642..795605bfdf5a 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": "4.0.8",
+  "version": "4.0.9",
   "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 acf37126e034..64a7be71b85e 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": "4.0.8",
+  "version": "4.0.9",
   "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 f4a5a55757a7..71b61e4175ff 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": "4.0.8",
+  "version": "4.0.9",
   "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 5d8f0e7f7fb0..182d9304e8ad 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": "4.0.8",
+  "version": "4.0.9",
   "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 65e144eff5c5..c257612c5339 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": "4.0.8",
+  "version": "4.0.9",
   "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 82d9176bb78f..2b96ad9dc8aa 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": "4.0.8",
+  "version": "4.0.9",
   "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 3568eadd347f..c9adbfa15c7a 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": "4.0.8",
+  "version": "4.0.9",
   "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 3873bbfcf7d0..2821071464fc 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": "4.0.8",
+  "version": "4.0.9",
   "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 9dd65ab208db..bf878fb7684c 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": "4.0.8",
+  "version": "4.0.9",
   "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 5f81818b6f3a..e47d01231be7 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": "4.0.8",
+  "version": "4.0.9",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/npm/win32-arm64-msvc/package.json b/crates/node/npm/win32-arm64-msvc/package.json
index 38a5524a7030..b40fe58bc801 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": "4.0.8",
+  "version": "4.0.9",
   "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 6621466e84f0..1168d7fc4c89 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": "4.0.8",
+  "version": "4.0.9",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tailwindlabs/tailwindcss.git",
diff --git a/crates/node/package.json b/crates/node/package.json
index fee69fecc63f..b97cbaa511fa 100644
--- a/crates/node/package.json
+++ b/crates/node/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/oxide",
-  "version": "4.0.8",
+  "version": "4.0.9",
   "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 0c2c2205015c..b5ccb0e93f58 100644
--- a/packages/@tailwindcss-browser/package.json
+++ b/packages/@tailwindcss-browser/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/browser",
-  "version": "4.0.8",
+  "version": "4.0.9",
   "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 c09e7d2727fc..0cc91c62e80b 100644
--- a/packages/@tailwindcss-cli/package.json
+++ b/packages/@tailwindcss-cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/cli",
-  "version": "4.0.8",
+  "version": "4.0.9",
   "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 4308f2b8215b..c88f8d614023 100644
--- a/packages/@tailwindcss-node/package.json
+++ b/packages/@tailwindcss-node/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/node",
-  "version": "4.0.8",
+  "version": "4.0.9",
   "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 d436ca1d43ee..5577943bc238 100644
--- a/packages/@tailwindcss-postcss/package.json
+++ b/packages/@tailwindcss-postcss/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/postcss",
-  "version": "4.0.8",
+  "version": "4.0.9",
   "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 07903154c441..eff28c5e8621 100644
--- a/packages/@tailwindcss-standalone/package.json
+++ b/packages/@tailwindcss-standalone/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/standalone",
-  "version": "4.0.8",
+  "version": "4.0.9",
   "private": true,
   "description": "Standalone CLI for Tailwind CSS",
   "license": "MIT",
diff --git a/packages/@tailwindcss-upgrade/package.json b/packages/@tailwindcss-upgrade/package.json
index 71e410b744ac..ffa9c650a3e3 100644
--- a/packages/@tailwindcss-upgrade/package.json
+++ b/packages/@tailwindcss-upgrade/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/upgrade",
-  "version": "4.0.8",
+  "version": "4.0.9",
   "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 cadd1e4a6623..06c3f26f7f88 100644
--- a/packages/@tailwindcss-vite/package.json
+++ b/packages/@tailwindcss-vite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tailwindcss/vite",
-  "version": "4.0.8",
+  "version": "4.0.9",
   "description": "A utility-first CSS framework for rapidly building custom user interfaces.",
   "license": "MIT",
   "repository": {
diff --git a/packages/tailwindcss/package.json b/packages/tailwindcss/package.json
index ee386be43e76..4ef0ec11c37f 100644
--- a/packages/tailwindcss/package.json
+++ b/packages/tailwindcss/package.json
@@ -1,6 +1,6 @@
 {
   "name": "tailwindcss",
-  "version": "4.0.8",
+  "version": "4.0.9",
   "description": "A utility-first CSS framework for rapidly building custom user interfaces.",
   "license": "MIT",
   "repository": {