diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e914126f..4799e7282 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,23 +3,14 @@ All **notable** changes to this project are documented here.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.1.0/)
 
-## [Unreleased]
+## [0.9.0]
 
-This version of Spine Toolbox requires Python version 3.9 or later.
-
-### Added
+Dropped support for Python 3.8.
+This version of Spine Toolbox requires Python version from 3.9 to 3.12.
 
 ### Changed
 - **Add/Update SpineOpt** wizard in **File->Settings->Tools** now requires SpineOpt v0.8.3 or higher.
 
-### Deprecated
-
-### Removed
-
-### Fixed
-
-### Security
-
 ## [0.8.5]
 
 ### Changed
diff --git a/README.md b/README.md
index 071e5efea..689a5d8ab 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,8 @@ These steps apply to both [Python/pipx](#installation-with-python-and-pipx) opti
 [From source files](#installation-from-sources-using-git) option.
 
 1. If you don't have Python installed, please install it e.g. from 
-[Python.org](https://www.python.org/downloads/). Please note that newest Python might not work (On 19th Oct. 2024, Python 3.13.0 failed due 'pg_config executable not found'. Python 3.11.9 did work.)
+[Python.org](https://www.python.org/downloads/).
+Please note that we support Python versions from 3.9 to 3.12.
 
 2. Test that python is now in your PATH. Open a new terminal (e.g. Command Prompt) window and type 
 
diff --git a/pyproject.toml b/pyproject.toml
index 891f76b71..4a5232eae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,8 +16,8 @@ dependencies = [
     "PySide6 >= 6.5.0, != 6.5.3, != 6.6.3, != 6.7.0, < 6.8",
     "jupyter_client >=6.0",
     "qtconsole >=5.1",
-    "spinedb_api>=0.31.6",
-    "spine_engine>=0.24.3",
+    "spinedb_api>=0.32.0",
+    "spine_engine>=0.25.0",
     "numpy >=1.20.2",
     "matplotlib >= 3.5",
     "scipy >=1.7.1",
@@ -26,7 +26,7 @@ dependencies = [
     "Pygments >=2.8",
     "jill >=0.9.2",
     "pyzmq >=21.0",
-    "spine_items>=0.22.3",
+    "spine_items>=0.23.0",
 ]
 
 [project.urls]