diff --git a/docs/releasenotes/4.0.rst b/docs/releasenotes/4.0.rst
new file mode 100644
index 0000000000000000000000000000000000000000..f428bc8938dff2f41b78c0679e6cc23b1bb06a52
--- /dev/null
+++ b/docs/releasenotes/4.0.rst
@@ -0,0 +1,38 @@
+.. default-intersphinx reviewbot4.0
+
+============================
+Review Bot 4.0 Release Notes
+============================
+
+**Release date**: TBD
+
+
+Installation/Upgrade
+====================
+
+Review Bot 4.0 includes full support for Review Board 5.0-7.0. It supports
+Python 3.8-3.12.
+
+The Review Bot 4 release is mostly a dependency modernization release,
+necessary to run on Review Board 7. This release drops support for very old
+versions of Python and Review Board.
+
+Follow our :ref:`installation guide <reviewbot-installation>` for installing
+the Review Bot extension and worker.
+
+To learn more, see:
+
+* :ref:`Documentation <reviewbot-docs>`
+* :pypi:`Review Bot Extension on PyPI <reviewbot-extension>`
+* :pypi:`Review Bot Worker on PyPI <reviewbot-worker>`
+
+
+New Features
+============
+
+PMD
+---
+
+The PMD tool now supports the recently-released `PMD 7`_.
+
+.. _`PMD 7`: https://pmd.github.io/pmd/pmd_release_notes_pmd7.html
diff --git a/docs/releasenotes/conf.py b/docs/releasenotes/conf.py
index a21e4274c5ce17c56a3b5602e90b5c31f0dd8391..6c639be2e5c14e7ffcafc8961d734fb063d3a503 100644
--- a/docs/releasenotes/conf.py
+++ b/docs/releasenotes/conf.py
@@ -365,6 +365,7 @@ intersphinx_mapping = {
     'reviewbot1.0': ('%s/docs/reviewbot/1.0/' % rbwebsite_url, None),
     'reviewbot2.0': ('%s/docs/reviewbot/2.0/' % rbwebsite_url, None),
     'reviewbot3.0': ('%s/docs/reviewbot/3.0/' % rbwebsite_url, None),
+    'reviewbot4.0': ('%s/docs/reviewbot/4.0/' % rbwebsite_url, None),
 }
 
 extlinks = {
diff --git a/docs/releasenotes/index.rst b/docs/releasenotes/index.rst
index a3cfe44705cb2e58bf3572b19b553d3994c70bf9..5d47e160b009fe653936b467454ef796745a622c 100644
--- a/docs/releasenotes/index.rst
+++ b/docs/releasenotes/index.rst
@@ -4,6 +4,14 @@
 Review Bot Release Notes
 ========================
 
+4.0 Releases
+============
+
+.. toctree::
+   :maxdepth: 1
+
+   4.0
+
 3.0 Releases
 ============
 
diff --git a/docs/reviewbot/index.rst b/docs/reviewbot/index.rst
index 1fd2a2c01b7afab21f22e3d156a0dc158409b9c0..c40ea612175d3a89a3b36047ea4d0e9dfdfee755 100644
--- a/docs/reviewbot/index.rst
+++ b/docs/reviewbot/index.rst
@@ -1,3 +1,5 @@
+.. _reviewbot-docs:
+
 ========================
 Review Bot Documentation
 ========================
diff --git a/docs/reviewbot/installation/index.rst b/docs/reviewbot/installation/index.rst
index 234d851156f303e497b4be57c9579250a7d05ceb..fce8540d93df5568b41ad55509e208bd7eb60f6a 100644
--- a/docs/reviewbot/installation/index.rst
+++ b/docs/reviewbot/installation/index.rst
@@ -1,3 +1,5 @@
+.. _reviewbot-installation:
+
 ============
 Installation
 ============