diff --git a/CHANGELOG.md b/CHANGELOG.md
index e3762aad1f..c60bc86080 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Change Log
 
+## v0.x.x Unreleased
+
+### New features
+
+### Maintenance and fixes
+
+### Deprecation
+
+### Documentation
+
 ## v0.17.1 (2024 Mar 13)
 
 ### Maintenance and fixes
diff --git a/arviz/__init__.py b/arviz/__init__.py
index c1b5f8095b..0397e274e8 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__ = "0.17.1"
+__version__ = "0.18.0.dev0"
 
 import logging
 import os
diff --git a/setup.py b/setup.py
index 08d663e229..e5f17cc37b 100644
--- a/setup.py
+++ b/setup.py
@@ -58,7 +58,7 @@ def get_version():
     long_description=get_long_description(),
     long_description_content_type="text/markdown",
     include_package_data=True,
-    python_requires=">=3.9",
+    python_requires=">=3.10",
     classifiers=[
         "Development Status :: 4 - Beta",
         "Framework :: Matplotlib",
@@ -67,7 +67,6 @@ def get_version():
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",