diff --git a/README.rst b/README.rst
index 6c5aeff..bbbbd77 100644
--- a/README.rst
+++ b/README.rst
@@ -50,12 +50,17 @@ While bcrypt remains an acceptable choice for password storage, depending on you
 Changelog
 =========
 
-UNRELEASED
-----------
+4.0.0
+-----
 
 * ``bcrypt`` is now implemented in Rust. Users building from source will need
   to have a Rust compiler available. Nothing will change for users downloading
   wheels.
+* We no longer ship ``manylinux2010`` wheels. Users should upgrade to the latest
+  ``pip`` to ensure this doesn’t cause issues downloading wheels on their
+  platform. We now ship ``manylinux_2_28`` wheels for users on new enough platforms.
+* ``NUL`` bytes are now allowed in inputs.
+
 
 3.2.2
 -----
diff --git a/src/bcrypt/__about__.py b/src/bcrypt/__about__.py
index 440c5a7..423e14d 100644
--- a/src/bcrypt/__about__.py
+++ b/src/bcrypt/__about__.py
@@ -32,7 +32,7 @@ __title__ = "bcrypt"
 __summary__ = "Modern password hashing for your software and your servers"
 __uri__ = "https://github.com/pyca/bcrypt/"
 
-__version__ = "4.0.0.dev1"
+__version__ = "4.0.0"
 
 __author__ = "The Python Cryptographic Authority developers"
 __email__ = "cryptography-dev@python.org"