diff --git a/CHANGES.txt b/CHANGES.txt
index ae7e4bc..f3935b2 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,6 +1,11 @@
 Changelog
 **********
 
+2.4 (unreleased)
+-----------------
+
+- Nothing yet
+
 2.3 (2024-05-15)
 -----------------
 
diff --git a/setup.py b/setup.py
index 9c1816c..92e1072 100755
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@
       description='Python library to process company names',
       long_description=long_description,
       long_description_content_type='text/markdown',
-      version='2.3',
+      version='2.4-dev',
       license="MIT",
       license_files=('LICENSE.txt',),
       classifiers = [