diff --git a/CHANGELOG.md b/CHANGELOG.md
index bff88859fe..8ecd1fecce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Change Log
 
+## v0.x.x Unreleased
+
+### New features
+
+### Maintenance and fixes
+
+### Deprecation
+
+### Documentation
+
 ## v0.19.0 (2024 Jul 19)
 
 ### New features
diff --git a/arviz/__init__.py b/arviz/__init__.py
index a38665b266..3961a80393 100644
--- a/arviz/__init__.py
+++ b/arviz/__init__.py
@@ -1,6 +1,6 @@
 # pylint: disable=wildcard-import,invalid-name,wrong-import-position
 """ArviZ is a library for exploratory analysis of Bayesian models."""
-__version__ = "0.19.0"
+__version__ = "0.20.0.dev0"
 
 import logging
 import os