diff --git a/CHANGES.rst b/CHANGES.rst
index 5e03573..482a299 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,7 +1,7 @@
 Changelog
 =========
 
-2.3.4 (unreleased)
+2.4.0 (unreleased)
 ------------------
 
 - Add permission to allow comment authors to delete their own comments if
diff --git a/setup.py b/setup.py
index 494515e..abc69e9 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 from setuptools import find_packages
 from setuptools import setup
 
-version = '2.3.4.dev0'
+version = '2.4.0.dev0'
 
 install_requires = [
     'setuptools',