diff --git a/changelog.rst b/changelog.rst
index bd180a0b..1c39f0d8 100644
--- a/changelog.rst
+++ b/changelog.rst
@@ -3,10 +3,10 @@
 Changelog
 ---------
 
-3.0.1
+4.0.0
 ~~~~~
 
-2023-xx-xx • `full history <https://github.com/gorakhargosh/watchdog/compare/v3.0.0...HEAD>`__
+2024-02-06 • `full history <https://github.com/gorakhargosh/watchdog/compare/v3.0.0...v4.0.0>`__
 
 - Drop support for Python 3.7.
 - Add support for Python 3.12.
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 49163faf..6307bd4e 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -23,7 +23,7 @@
 
 PROJECT_NAME = "watchdog"
 AUTHOR_NAME = "Yesudeep Mangalapilly and contributors"
-COPYRIGHT = "2010-2023, " + AUTHOR_NAME
+COPYRIGHT = f"2010-2024, {AUTHOR_NAME}"
 
 
 # -- General configuration -----------------------------------------------------
diff --git a/docs/source/global.rst.inc b/docs/source/global.rst.inc
index 21f02d14..9572efe0 100644
--- a/docs/source/global.rst.inc
+++ b/docs/source/global.rst.inc
@@ -2,9 +2,9 @@
 
 .. |author_name| replace:: Yesudeep Mangalapilly
 .. |author_email| replace:: yesudeep@gmail.com
-.. |copyright| replace:: Copyright 2012-2023 Google, Inc & contributors.
+.. |copyright| replace:: Copyright 2012-2024 Google, Inc & contributors.
 .. |project_name| replace:: ``watchdog``
-.. |project_version| replace:: 3.0.1
+.. |project_version| replace:: 4.0.0
 
 .. _issue tracker: https://github.com/gorakhargosh/watchdog/issues
 .. _code repository: https://github.com/gorakhargosh/watchdog
diff --git a/src/watchdog/version.py b/src/watchdog/version.py
index b912a8c4..6e050201 100644
--- a/src/watchdog/version.py
+++ b/src/watchdog/version.py
@@ -18,9 +18,9 @@
 
 # When updating this version number, please update the
 # ``docs/source/global.rst.inc`` file as well.
-VERSION_MAJOR = 3
+VERSION_MAJOR = 4
 VERSION_MINOR = 0
-VERSION_BUILD = 1
+VERSION_BUILD = 0
 VERSION_INFO = (VERSION_MAJOR, VERSION_MINOR, VERSION_BUILD)
 VERSION_STRING = f"{VERSION_MAJOR}.{VERSION_MINOR}.{VERSION_BUILD}"