diff --git a/CHANGELOG.md b/CHANGELOG.md
index c1d626abc424c2466bb79243f9e88abdc548dfc5..2419b32ffa48bdc9f0d1c93319348dea70cd744c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ All notable changes to this project 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] ##
+## [0.9.0] - 2023-11-27 ##
 
 ### Added ###
 
@@ -22,17 +22,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * `TableImporter.check_datatypes` allows numeric values in string columns if
   `strict=False` (default).
 
-### Deprecated ###
-
-### Removed ###
-
 ### Fixed ###
 
 * `TableImporter.check_missing` in case of array-valued fields in table
 * YAML model parser has better description handling.
 
-### Security ###
-
 ### Documentation ###
 
 * Test coverage reports are now generated in `.tox/cov_html/` by tox.
diff --git a/CITATION.cff b/CITATION.cff
index bd468e5ad1704db033f8e81bac5277194adc2158..eea049338996c494a88076b9e9e0f3131ed44a66 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -20,6 +20,6 @@ authors:
     given-names: Stefan
     orcid: https://orcid.org/0000-0001-7214-8125
 title: CaosDB - Advanced User Tools
-version: 0.8.0
+version: 0.9.0
 doi: 10.3390/data4020083
-date-released: 2023-05-30
\ No newline at end of file
+date-released: 2023-11-27
\ No newline at end of file
diff --git a/setup.py b/setup.py
index f71fd2616bc61ef1b8f1b36048ee5380f215211d..50cb59467a5162663d31a23e4cfd2159a611bf9c 100755
--- a/setup.py
+++ b/setup.py
@@ -46,10 +46,10 @@ from setuptools import find_packages, setup
 ########################################################################
 
 MAJOR = 0
-MINOR = 8
-MICRO = 1
+MINOR = 9
+MICRO = 0
 PRE = ""  # e.g. rc0, alpha.1, 0.beta-23
-ISRELEASED = False
+ISRELEASED = True
 
 if PRE:
     VERSION = "{}.{}.{}-{}".format(MAJOR, MINOR, MICRO, PRE)
diff --git a/src/doc/conf.py b/src/doc/conf.py
index 4436981e354210a188cb1038489f698c48b65dd2..60630cf6c2c00aae2c9a48a328613e247e0a4015 100644
--- a/src/doc/conf.py
+++ b/src/doc/conf.py
@@ -23,13 +23,13 @@ import sphinx_rtd_theme
 # -- Project information -----------------------------------------------------
 
 project = 'caosadvancedtools'
-copyright = '2021, IndiScale GmbH'
+copyright = '2023, IndiScale GmbH'
 author = 'Daniel Hornung'
 
 # The short X.Y version
-version = '0.8.1'
+version = '0.9.0'
 # The full version, including alpha/beta/rc tags
-release = '0.8.1-dev'
+release = '0.9.0'
 
 
 # -- General configuration ---------------------------------------------------