diff --git a/CHANGELOG.md b/CHANGELOG.md
index e6f200e107cdee3aa2382c99166b921650a8eb5f..3567f09ce83e8e25452e6a71e1af54be2735a2ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,24 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [0.9.0] - 2023-01-19
 
 ### Added
 
 * SELECT query support for the GRPC API
 
-### Changed
-
-### Deprecated
-
-### Removed
-
-### Fixed
-
-### Security
-
-### Documentation
-
 ## [0.8.1] - 2022-11-07
 (Timm Fitschen)
 
diff --git a/DEPENDENCIES.md b/DEPENDENCIES.md
index 0f380b923c39129a7f29e380436857a3e9c6d8f6..d772f4b392b782e7bcb9a82f77898402218660c1 100644
--- a/DEPENDENCIES.md
+++ b/DEPENDENCIES.md
@@ -2,7 +2,7 @@
 
 ## For Building and Running the Server
 
-* `>=caosdb-proto 0.2.0`
+* `>=caosdb-proto 0.3.0`
 * `>=caosdb-mysqlbackend 5.0.0`
 * `>=Java 11`
 * `>=Apache Maven 3.6.0`
diff --git a/FEATURES.md b/FEATURES.md
index 485172f0dd8c930e36a7c216d0d8a9dd7e8086f3..2c046daee0518eb12e4de807a7ffe165c74d8664 100644
--- a/FEATURES.md
+++ b/FEATURES.md
@@ -1,6 +1,6 @@
 # Features
 
-* The CaosDB Server implements a CaosDB GRPC API Endpoint (v0.2.0)
+* The CaosDB Server implements a CaosDB GRPC API Endpoint (v0.3.0)
   Authentication is supported via a Basic scheme, using the well-known
   "authentication" header.
   Notable limitations of the current implementation of the API:
diff --git a/caosdb-proto b/caosdb-proto
index 13d083b84400507f6f1967a099e2af006af2a231..c6405e538c179d2a8af952f85d9e9dc51fbadb92 160000
--- a/caosdb-proto
+++ b/caosdb-proto
@@ -1 +1 @@
-Subproject commit 13d083b84400507f6f1967a099e2af006af2a231
+Subproject commit c6405e538c179d2a8af952f85d9e9dc51fbadb92
diff --git a/caosdb-webui b/caosdb-webui
index a3767124c9400da1418d87fe7efdb09a630acca4..421b2dce5199a5a2c96bcc638543c1fd51d48870 160000
--- a/caosdb-webui
+++ b/caosdb-webui
@@ -1 +1 @@
-Subproject commit a3767124c9400da1418d87fe7efdb09a630acca4
+Subproject commit 421b2dce5199a5a2c96bcc638543c1fd51d48870
diff --git a/pom.xml b/pom.xml
index c76d397b8fc1e655f1cf0fbf675e3b549eea876a..ea47a9e516122019c06146a61538b5957d1d5b0f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -25,7 +25,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.caosdb</groupId>
   <artifactId>caosdb-server</artifactId>
-  <version>0.9.0-SNAPSHOT</version>
+  <version>0.9.0</version>
   <packaging>jar</packaging>
   <name>CaosDB Server</name>
   <scm>
diff --git a/src/doc/conf.py b/src/doc/conf.py
index 02576662d8d15acec8d5cacef2126e6b0102339b..b0c958c03bbb23b9642a36f91a4d62cbe373f6e6 100644
--- a/src/doc/conf.py
+++ b/src/doc/conf.py
@@ -27,7 +27,7 @@ author = 'Daniel Hornung, Timm Fitschen'
 # The short X.Y version
 version = '0.9.0'
 # The full version, including alpha/beta/rc tags
-release = '0.9.0-SNAPSHOT'
+release = '0.9.0'
 
 
 # -- General configuration ---------------------------------------------------