diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e3606f96f6738..4e2368863abb08 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,92 @@
 # [Versions](https://mui.com/versions/)
 
+## v6.0.0-alpha.1
+
+<!-- generated comparing v6.0.0-alpha.0..next -->
+
+_Apr 5, 2024_
+
+A big thanks to the 19 contributors who made this release possible. Here are some highlights ✨:
+
+- 🔥 Converted 3 more Material UI components to use Pigment CSS. Current progress is 36%!
+- 🚀 Added a spacing CSS variable to the Material UI and Joy UI themes.
+- 💫 Added 3 redesigned free Material UI templates: [Sign-in](https://next.mui.com/material-ui/getting-started/templates/sign-in/), [Sign-in side](https://next.mui.com/material-ui/getting-started/templates/sign-in-side/), and [Sign-up](https://next.mui.com/material-ui/getting-started/templates/sign-up/).
+
+### `@mui/material@6.0.0-alpha.1`
+
+- [AppBar] Convert to support CSS extraction (#41247) @mnajdova
+- [Badge] Deprecate components and componentsProps (#41655) @skmanoj322
+- [Button] Convert to support CSS extraction (#41378) @siriwatknp
+- [ButtonGroup] Convert to support CSS extraction (#41666) @zanivan
+- [RadioGroup] Apply classnames (#41610) @ZeeshanTamboli
+- [Slider] Move palette styles to the bottom (#41676) @siriwatknp
+- Add the `spacing` theme token (#40224) @siriwatknp
+
+### `@mui/system@6.0.0-alpha.1`
+
+- Add the `spacing` theme token to be used in `theme.spacing()` (#40224) @siriwatknp
+
+### `@mui/codemod@6.0.0-alpha.1`
+
+- [codemod] Setup v6 codemod structure (#41668) @DiegoAndai
+
+### `@mui/lab@6.0.0-alpha.1`
+
+- [TabPanel] Add keepMounted prop to match Joy UI (#41651) @ppaskaris-plooto
+
+### `@mui/joy@5.0.0-beta.34`
+
+- Add `spacing` theme token (#40224) @siriwatknp
+
+### `@pigment-css/react@0.0.5`
+
+- Improve sx prop support (#41589) @brijeshb42
+- Fix Emotion styled error (#41699) @siriwatknp
+- Fix propTypes removal during eval stage (#41695) @brijeshb42
+- Fix props forwarding (#41688) @siriwatknp
+- Fix sx prop transformation on Box (#41705) @brijeshb42
+
+### `@pigment-css/vite-plugin@0.0.5`
+
+- Use constant filename for pigment styles (#41667) @brijeshb42
+
+### `@pigment-css/nextjs-plugin@0.0.5`
+
+- Add missing RTL implementation (#41751) @brijeshb42
+
+### Docs
+
+- [pigment-css] Update README.md installation to use the next tag (#41649) @mnajdova
+- [pigment-css] Add "Building design system components" guide with Pigment CSS (#41635) @siriwatknp
+- Continue migration of Base UI to sperate repository @oliviertassinari
+- Stick to one way to write IE 11 @oliviertassinari
+- Fix typo in CONTRIBUTING.md (#41670) @adriancuadrado
+- Drop IE 11 official support (#41611) @iammminzzy
+- [material-ui] Fix typo on the Accordion page (#41687) @connorshea
+- [pigment-css] Add small edits on the README (#41646) @danilo-leal
+- [pigment-css] Edit the example app's README files (#41639) @danilo-leal
+
+### Core
+
+- [code-infra] Move BrandingProvider/brandingTheme/InfoCard to @mui/docs (#41206) @Janpot
+- [core] Automate cherry-pick of PRs from `next` -> `master` (#41741) @aarongarciah
+- [core] Update the prettier script to use the next branch (#41637) @mnajdova
+- [docs-infra] Skip loading source for non-editable modules (#41588) @bharatkashyap
+- [docs-infra] Vale rule for M3 (#41737) @oliviertassinari
+- [docs-infra] Allows to remove edit button (#41702) @alexfauquette
+- [pigment-css][examples] Add example project with Remix (#41700) @brijeshb42
+- [examples] Update MUI's packages to the next version (#41701) @mnajdova
+- [material-ui] Refine the Sign-in and Sign-up templates (#41192) @zanivan
+- [test] Add test to display options provided to the options prop even if loading is true. (#41675) @ZeeshanTamboli
+- [blog] Refresh the design slightly (#41697) @danilo-leal
+- [website] Use en-US over en-UK for career link @oliviertassinari
+- [website] Add Aarón to About Us (#41736) @aarongarciah
+- [website] Refine button design and other details (#41686) @danilo-leal
+- [website] Improve job og image (#41672) @oliviertassinari
+- [website] Page <title> should have no dots @oliviertassinari
+
+All contributors of this release in alphabetical order: @aarongarciah, @adriancuadrado, @alexfauquette, @bharatkashyap, @brijeshb42, @connorshea, @danilo-leal, @DiegoAndai, @iammminzzy, @Janpot, @JCQuintas, @levigunz, @mnajdova, @oliviertassinari, @ppaskaris-plooto, @siriwatknp, @skmanoj322, @zanivan, @ZeeshanTamboli
+
 ## v6.0.0-alpha.0
 
 <!-- generated comparing v5.15.14..next -->
@@ -79,6 +166,46 @@ A big thanks to the 18 contributors who made this release possible. Here are som
 
 All contributors of this release in alphabetical order: @aacevski, @brijeshb42, @cherniavskii, @cipherlogs, @danilo-leal, @DiegoAndai, @harry-whorlow, @Janpot, @joserodolfofreitas, @michael-land, @michaldudak, @mnajdova, @nekoya, @sai6855, @siriwatknp, @StylesTrip, @zanivan, @ZeeshanTamboli
 
+## v5.15.15
+
+<!-- generated comparing v5.15.14..master -->
+
+_Apr 4, 2024_
+
+A big thanks to the 7 contributors who made this release possible. Here are some highlights ✨:
+This release was mostly about 🐛 bug fixes and 📚 documentation improvements.
+
+### `@mui/material@5.15.15`
+
+- [Autocomplete] Display options provided to the `options` prop even if loading is true (#41677) @ZeeshanTamboli
+- [RadioGroup] Apply classnames (#41681) @ZeeshanTamboli
+
+### `@mui/system@5.15.15`
+
+- Fix typo to avoid infinite recursion in function call (#41678) @ZeeshanTamboli
+
+### Docs
+
+- [material-ui][Slider] Remove `valueLabelFormat` from restricted values demo so that the tooltip thumb label displays the same as the value text (#41679) @ZeeshanTamboli
+- [material-ui] Remove deleted page from the sidenav (#41594) @danilo-leal
+- [material-ui] Fix typo in CSS theme variables customization (#41680) @ZeeshanTamboli
+- Continue migration of Base UI to sperate repository @oliviertassinari
+- Add notification for MUI X v7 blog post (#41587) (#41605) @cherniavskii
+- Update the versions dropdown to show v6 (#41557) @mnajdova
+
+### Core
+
+- [blog] Link to Romain's blog post in MUI X v7 announcement post (#41641) @cherniavskii
+- [blog] Blog post with MUI X v7.0.0 annoucement (#41563) (#41604) @cherniavskii
+- [blog] Add post about remote (#41565) @danilo-leal
+- [core] Continue rename of Toolpad @oliviertassinari
+- [docs-infra] Add Toolpad product/category IDs to types (#41551) @bharatkashyap
+- [website] Add Aarón to About Us (#41747) @aarongarciah
+- [website] Add stray design adjustments throughout the site (#41642) @mnajdova
+- [website] Update pricing table (#41606) @cherniavskii
+
+All contributors of this release in alphabetical order: @aarongarciah, @bharatkashyap, @cherniavskii, @danilo-leal, @mnajdova, @oliviertassinari, @ZeeshanTamboli
+
 ## v5.15.14
 
 <!-- generated comparing v5.15.13..master -->
diff --git a/package.json b/package.json
index c3050a6a39ee78..924421e2d33bd0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/monorepo",
-  "version": "6.0.0-alpha.0",
+  "version": "6.0.0-alpha.1",
   "private": true,
   "scripts": {
     "preinstall": "npx only-allow pnpm",
diff --git a/packages-internal/docs-utils/package.json b/packages-internal/docs-utils/package.json
index c0ac779a5cf3f5..19fea4389bd2c8 100644
--- a/packages-internal/docs-utils/package.json
+++ b/packages-internal/docs-utils/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/internal-docs-utils",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "author": "MUI Team",
   "description": "Utilities for MUI docs. This is an internal package not meant for general use.",
   "main": "./build/index.js",
diff --git a/packages-internal/scripts/package.json b/packages-internal/scripts/package.json
index ea8086d170db3a..103cff35e16457 100644
--- a/packages-internal/scripts/package.json
+++ b/packages-internal/scripts/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/internal-scripts",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "author": "MUI Team",
   "description": "Utilities supporting MUI libraries build and docs generation. This is an internal package not meant for general use.",
   "main": "build/index.js",
diff --git a/packages/markdown/package.json b/packages/markdown/package.json
index f62b53d362f052..9f07beee6f9893 100644
--- a/packages/markdown/package.json
+++ b/packages/markdown/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/internal-markdown",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "author": "MUI Team",
   "description": "MUI markdown parser. This is an internal package not meant for general use.",
   "main": "./index.js",
diff --git a/packages/mui-babel-macros/package.json b/packages/mui-babel-macros/package.json
index 81d369122291af..84372b9790c7ad 100644
--- a/packages/mui-babel-macros/package.json
+++ b/packages/mui-babel-macros/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/internal-babel-macros",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "author": "MUI Team",
   "description": "MUI Babel macros. This is an internal package not meant for general use.",
   "main": "./MuiError.macro.js",
diff --git a/packages/mui-base/package.json b/packages/mui-base/package.json
index f85da5038350b7..c4b77efe2b5f0b 100644
--- a/packages/mui-base/package.json
+++ b/packages/mui-base/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/base",
-  "version": "5.0.0-beta.41",
+  "version": "5.0.0-beta.42",
   "private": false,
   "author": "MUI Team",
   "description": "Base UI is a library of headless ('unstyled') React components and low-level hooks. You gain complete control over your app's CSS and accessibility features.",
diff --git a/packages/mui-codemod/package.json b/packages/mui-codemod/package.json
index 98bad4c9ffb08b..77a16a880d3dbe 100644
--- a/packages/mui-codemod/package.json
+++ b/packages/mui-codemod/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/codemod",
-  "version": "6.0.0-alpha.0",
+  "version": "6.0.0-alpha.1",
   "bin": "./codemod.js",
   "private": false,
   "author": "MUI Team",
diff --git a/packages/mui-core-downloads-tracker/package.json b/packages/mui-core-downloads-tracker/package.json
index 50d462045792c9..ea0473b2e4d347 100644
--- a/packages/mui-core-downloads-tracker/package.json
+++ b/packages/mui-core-downloads-tracker/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/core-downloads-tracker",
-  "version": "6.0.0-alpha.0",
+  "version": "6.0.0-alpha.1",
   "private": false,
   "author": "MUI Team",
   "description": "Internal package to track number of downloads of our design system libraries",
diff --git a/packages/mui-docs/package.json b/packages/mui-docs/package.json
index d7cfe6c19c84b8..c9159a53f8e209 100644
--- a/packages/mui-docs/package.json
+++ b/packages/mui-docs/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/docs",
-  "version": "6.0.0-alpha.0",
+  "version": "6.0.0-alpha.1",
   "private": false,
   "author": "MUI Team",
   "description": "MUI Docs - Documentation building blocks.",
@@ -41,8 +41,8 @@
     "prop-types": "^15.8.1"
   },
   "devDependencies": {
-    "@mui/material": "workspace:*",
     "@mui/icons-material": "workspace:*",
+    "@mui/material": "workspace:*",
     "@types/node": "^18.19.28",
     "@types/prop-types": "^15.7.12",
     "@types/react": "^18.2.55",
@@ -50,9 +50,9 @@
     "react": "^18.2.0"
   },
   "peerDependencies": {
-    "@mui/material": "^5.0.0",
     "@mui/base": "*",
     "@mui/icons-material": "^5.0.0",
+    "@mui/material": "^5.0.0",
     "@mui/system": "^5.0.0",
     "@types/react": "^17.0.0 || ^18.0.0",
     "next": "^13.5.1 || ^14",
diff --git a/packages/mui-envinfo/package.json b/packages/mui-envinfo/package.json
index 6df16c363800eb..b345ea78a6c5b6 100644
--- a/packages/mui-envinfo/package.json
+++ b/packages/mui-envinfo/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/envinfo",
-  "version": "2.0.19",
+  "version": "2.0.20",
   "private": false,
   "author": "MUI Team",
   "description": "Logs infos about the environment relevant to @mui/*",
diff --git a/packages/mui-icons-material/package.json b/packages/mui-icons-material/package.json
index 506199c74a360c..aff4aa5d0b1a59 100644
--- a/packages/mui-icons-material/package.json
+++ b/packages/mui-icons-material/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/icons-material",
-  "version": "6.0.0-alpha.0",
+  "version": "6.0.0-alpha.1",
   "private": false,
   "author": "MUI Team",
   "description": "Material Design icons distributed as SVG React components.",
diff --git a/packages/mui-joy/package.json b/packages/mui-joy/package.json
index e0b4746c399d5b..c9c82025784319 100644
--- a/packages/mui-joy/package.json
+++ b/packages/mui-joy/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/joy",
-  "version": "5.0.0-beta.33",
+  "version": "5.0.0-beta.34",
   "private": false,
   "author": "MUI Team",
   "description": "Joy UI is an open-source React component library that implements MUI's own design principles. It's comprehensive and can be used in production out of the box.",
diff --git a/packages/mui-lab/package.json b/packages/mui-lab/package.json
index 3692630ab025ed..c8063455f88d6e 100644
--- a/packages/mui-lab/package.json
+++ b/packages/mui-lab/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/lab",
-  "version": "6.0.0-alpha.0",
+  "version": "6.0.0-alpha.1",
   "private": false,
   "author": "MUI Team",
   "description": "Laboratory for new MUI modules.",
diff --git a/packages/mui-material/package.json b/packages/mui-material/package.json
index 1068db963e89e1..0de43ab45ae7e6 100644
--- a/packages/mui-material/package.json
+++ b/packages/mui-material/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/material",
-  "version": "6.0.0-alpha.0",
+  "version": "6.0.0-alpha.1",
   "private": false,
   "author": "MUI Team",
   "description": "Material UI is an open-source React component library that implements Google's Material Design. It's comprehensive and can be used in production out of the box.",
diff --git a/packages/mui-private-theming/package.json b/packages/mui-private-theming/package.json
index 2f6e029dba0279..938b284406fafb 100644
--- a/packages/mui-private-theming/package.json
+++ b/packages/mui-private-theming/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/private-theming",
-  "version": "5.15.14",
+  "version": "6.0.0-alpha.1",
   "private": false,
   "author": "MUI Team",
   "description": "Private - The React theme context to be shared between `@mui/styles` and `@mui/material`.",
diff --git a/packages/mui-styled-engine-sc/package.json b/packages/mui-styled-engine-sc/package.json
index 1bc6ab3faf2bab..4cedca1700dfed 100644
--- a/packages/mui-styled-engine-sc/package.json
+++ b/packages/mui-styled-engine-sc/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/styled-engine-sc",
-  "version": "6.0.0-alpha.19",
+  "version": "6.0.0-alpha.20",
   "private": false,
   "author": "MUI Team",
   "description": "styled() API wrapper package for styled-components.",
diff --git a/packages/mui-styled-engine/package.json b/packages/mui-styled-engine/package.json
index 1303e71df1c1af..4d446b33c2d6b3 100644
--- a/packages/mui-styled-engine/package.json
+++ b/packages/mui-styled-engine/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/styled-engine",
-  "version": "6.0.0-alpha.0",
+  "version": "6.0.0-alpha.1",
   "private": false,
   "author": "MUI Team",
   "description": "styled() API wrapper package for emotion.",
diff --git a/packages/mui-styles/package.json b/packages/mui-styles/package.json
index 2f5e3d5b1a9909..4d7b89cc44fb6f 100644
--- a/packages/mui-styles/package.json
+++ b/packages/mui-styles/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/styles",
-  "version": "6.0.0-alpha.0",
+  "version": "6.0.0-alpha.1",
   "private": false,
   "author": "MUI Team",
   "description": "MUI Styles - The legacy JSS-based styling solution of Material UI.",
diff --git a/packages/mui-system/package.json b/packages/mui-system/package.json
index 49d8ce4133241d..fac9225f8ca07f 100644
--- a/packages/mui-system/package.json
+++ b/packages/mui-system/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/system",
-  "version": "6.0.0-alpha.0",
+  "version": "6.0.0-alpha.1",
   "private": false,
   "author": "MUI Team",
   "description": "MUI System is a set of CSS utilities to help you build custom designs more efficiently. It makes it possible to rapidly lay out custom designs.",
diff --git a/packages/mui-utils/package.json b/packages/mui-utils/package.json
index 106497783ed29e..19f2d56f7c7223 100644
--- a/packages/mui-utils/package.json
+++ b/packages/mui-utils/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/utils",
-  "version": "5.15.14",
+  "version": "6.0.0-alpha.1",
   "private": false,
   "author": "MUI Team",
   "description": "Utility functions for React components.",
diff --git a/packages/pigment-css-nextjs-plugin/package.json b/packages/pigment-css-nextjs-plugin/package.json
index 48fc30fa15324f..dedb94f6ded632 100644
--- a/packages/pigment-css-nextjs-plugin/package.json
+++ b/packages/pigment-css-nextjs-plugin/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@pigment-css/nextjs-plugin",
-  "version": "0.0.4",
+  "version": "0.0.5",
   "main": "build/index.js",
   "module": "build/index.mjs",
   "types": "build/index.d.ts",
diff --git a/packages/pigment-css-react/package.json b/packages/pigment-css-react/package.json
index a8a9bf433e2086..b2c1629a6a8c6c 100644
--- a/packages/pigment-css-react/package.json
+++ b/packages/pigment-css-react/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@pigment-css/react",
-  "version": "0.0.4",
+  "version": "0.0.5",
   "main": "build/index.js",
   "module": "build/index.mjs",
   "types": "build/index.d.ts",
diff --git a/packages/pigment-css-unplugin/package.json b/packages/pigment-css-unplugin/package.json
index 9dff04d1e21d7f..f188da2f49e60f 100644
--- a/packages/pigment-css-unplugin/package.json
+++ b/packages/pigment-css-unplugin/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@pigment-css/unplugin",
-  "version": "0.0.4",
+  "version": "0.0.5",
   "main": "build/index.js",
   "module": "build/index.mjs",
   "types": "build/index.d.ts",
diff --git a/packages/pigment-css-vite-plugin/package.json b/packages/pigment-css-vite-plugin/package.json
index cbc4e3d1f07a7d..b4d8b819249d01 100644
--- a/packages/pigment-css-vite-plugin/package.json
+++ b/packages/pigment-css-vite-plugin/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@pigment-css/vite-plugin",
-  "version": "0.0.4",
+  "version": "0.0.5",
   "main": "build/index.js",
   "module": "build/index.mjs",
   "types": "build/index.d.ts",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index de10632995a623..300e5ad64dda84 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1205,7 +1205,7 @@ importers:
         version: 7.24.1
       '@mui/utils':
         specifier: ^5.0.0
-        version: link:../mui-utils/build
+        version: 5.15.14(@types/react@18.2.55)(react@18.2.0)
       babel-plugin-macros:
         specifier: ^3.1.0
         version: 3.1.0