diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e1e5b29..620c1f75 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -34,6 +34,10 @@ Using the following categories, list your changes in this order:
 
 ## [Unreleased]
 
+-   Nothing (yet)!
+
+## [4.0.0]
+
 ### Added
 
 -   Client-side Python components can now be rendered via the new `{% pyscript_component %}` template tag
@@ -497,7 +501,8 @@ Using the following categories, list your changes in this order:
 
 -   Support for IDOM within the Django
 
-[Unreleased]: https://github.com/reactive-python/reactpy-django/compare/3.8.1...HEAD
+[Unreleased]: https://github.com/reactive-python/reactpy-django/compare/4.0.0...HEAD
+[4.0.0]: https://github.com/reactive-python/reactpy-django/compare/3.8.1...4.0.0
 [3.8.1]: https://github.com/reactive-python/reactpy-django/compare/3.8.0...3.8.1
 [3.8.0]: https://github.com/reactive-python/reactpy-django/compare/3.7.0...3.8.0
 [3.7.0]: https://github.com/reactive-python/reactpy-django/compare/3.6.0...3.7.0
diff --git a/src/reactpy_django/__init__.py b/src/reactpy_django/__init__.py
index 0bbff9d1..d4ece375 100644
--- a/src/reactpy_django/__init__.py
+++ b/src/reactpy_django/__init__.py
@@ -17,7 +17,7 @@
     REACTPY_WEBSOCKET_ROUTE,
 )
 
-__version__ = "3.8.1"
+__version__ = "4.0.0"
 __all__ = [
     "REACTPY_WEBSOCKET_PATH",
     "REACTPY_WEBSOCKET_ROUTE",