diff --git a/CMakeLists.txt b/CMakeLists.txt
index 276b0beb..536968dc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@
 
 # Base configuration
 cmake_minimum_required(VERSION 3.15 FATAL_ERROR)
-project(Brion VERSION 3.3.8)
+project(Brion VERSION 3.3.9)
 set(Brion_VERSION_ABI 10)
 
 # Enforce C++14 standard
diff --git a/brain/python/brion/__init__.py b/brain/python/brion/__init__.py
index 2acd280f..2ec64d5c 100644
--- a/brain/python/brion/__init__.py
+++ b/brain/python/brion/__init__.py
@@ -22,7 +22,7 @@
 
 from . import neuron
 
-__version__ = '3.3.8'
+__version__ = '3.3.9'
 
 # Import the test helper module if present
 try:
diff --git a/doc/Changelog.md b/doc/Changelog.md
index f0ff1e88..c6b37dc4 100644
--- a/doc/Changelog.md
+++ b/doc/Changelog.md
@@ -1,6 +1,15 @@
 Changelog {#Changelog}
 =========
 
+# Release 3.3.9
+
+* [350](https://github.com/BlueBrain/Brion/pull/350)
+  3.3.9 Release preparation
+* [349](https://github.com/BlueBrain/Brion/pull/349)
+  Update libsonata and Highfive to latest releases. Removes meshHDF5
+* [345](https://github.com/BlueBrain/Brion/pull/345)
+  Fix currentDir handling
+
 # Release 3.3.8
 
 * [344](https://github.com/BlueBrain/Brion/pull/344)