diff --git a/README.md b/README.md
index e628aadcda..d0ea9dc81c 100644
--- a/README.md
+++ b/README.md
@@ -1,48 +1,7 @@
-<p align=center><a href="https://leanprover.github.io"><img src="https://leanprover.github.io/images/lean_logo.svg" alt="logo" width="300px"/></a></p>
-<table>
-  <tr>
-    <th>License</th><th>Windows</th><th>Linux / macOS</th><th>Test Coverage</th><th>Chat</th>
-  </tr>
-  <tr>
-    <td><a href="LICENSE"><img src="https://img.shields.io/badge/license-APACHE_2-green.svg?dummy" title="License"/></a></td>
-    <td><a href="https://ci.appveyor.com/project/leodemoura/lean/branch/lean4"><img src="https://ci.appveyor.com/api/projects/status/lush6vyy1m0qg6vc/branch/lean4"/></a></td>
-    <td><a href="https://travis-ci.org/leanprover/lean/branches"><img src="https://travis-ci.org/leanprover/lean.png?branch=lean4"/></a></td>
-    <td><a href="https://codecov.io/gh/leanprover/lean/branch/lean4"><img src="https://codecov.io/gh/leanprover/lean/branch/lean4/graph/badge.svg" alt="Codecov"/></a></td>
-    <td><a href="https://leanprover.zulipchat.com"><img src="https://img.shields.io/badge/zulip-join_chat-brightgreen.svg" alt="Join the Zulip chat"/></a></td>
-  </tr>
-</table>
+We are currently developing Lean 4. [Lean 3](https://github.com/leanprover/lean) is still the latest official release.
+This repository contains work in progress.
 
-About
------
-
-- [Homepage](http://leanprover.github.io)
-- [Theorem Proving in Lean](https://leanprover.github.io/theorem_proving_in_lean/index.html)
-- [Core library](library/library.md)
-- [Change Log](doc/changes.md)
-- [FAQ](doc/faq.md)
-- For HoTT mode, please use [Lean2](https://github.com/leanprover/lean2).
-
-Installation
-------------
-
-Stable and nightly binary releases of Lean are available on the [homepage](https://leanprover.github.io/download/). For building Lean from source, see the [build instructions](doc/make/index.md).
-
-Miscellaneous
--------------
-
-- Building Doxygen Documentation: `doxygen src/Doxyfile`
-- [Coding Style](doc/coding_style.md)
-- [Library Style Conventions](doc/lean/library_style.org)
-- [Git Commit Conventions](doc/commit_convention.md)
-- [Automatic Builds](doc/make/travis.md)
-- [Syntax Highlight Lean Code in LaTeX](doc/syntax_highlight_in_latex.md)
-- [Exporting, and reference type-checkers](doc/export_format.md)
-
-Roadmap
--------------
-
-- [Open RFC issues](https://github.com/leanprover/lean/issues?q=is%3Aissue+is%3Aopen+label%3ARFC)
-- [Features](https://github.com/leanprover/lean/issues?q=is%3Aissue+is%3Aopen+label%3AFeature)
-- [Wish list](https://github.com/leanprover/lean/issues?q=is%3Aissue+is%3Aopen+label%3AI-wishlist)
-- [High priority issues](https://github.com/leanprover/lean/issues?q=is%3Aissue+is%3Aopen+label%3AP-high)
-- [Medium priority issues](https://github.com/leanprover/lean/issues?q=is%3Aissue+is%3Aopen+label%3AP-medium)
+**Important**. Unless you are one of our collaborators
+- We strongly suggest you use Lean 3.
+- Pull requests are not welcome.
+- New issues are not welcome, and will be closed without any feedback.