diff --git a/CHANGELOG.md b/CHANGELOG.md
index 26c88e249..440b72697 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ All notable changes to Shiny for Python will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [UNRELEASED] - YYYY-MM-DD
+
 
 ## [0.8.0] - 2024-03-04
 
diff --git a/shiny/__init__.py b/shiny/__init__.py
index 831045706..3c681c22e 100644
--- a/shiny/__init__.py
+++ b/shiny/__init__.py
@@ -1,6 +1,6 @@
 """A package for building reactive web applications."""
 
-__version__ = "0.8.0"
+__version__ = "0.8.0.9000"
 
 from ._shinyenv import is_pyodide as _is_pyodide