diff --git a/CHANGELOG.md b/CHANGELOG.md
index a43daf91..b1bffeac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 # CHANGELOG
 
+### 0.4.0
  * Added MermaidJS diagram generators (#27)
 
 ### 0.3.9
diff --git a/Doxyfile b/Doxyfile
index 9089440d..69e9c2c3 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "clang-uml"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.3.9
+PROJECT_NUMBER         = 0.4.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/README.md b/README.md
index 8fd3f0e9..b413c4f8 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 
 [![Build status](https://github.com/bkryza/clang-uml/actions/workflows/build.yml/badge.svg)](https://github.com/bkryza/clang-uml/actions)
 [![Coverage](https://codecov.io/gh/bkryza/clang-uml/branch/master/graph/badge.svg)](https://codecov.io/gh/bkryza/clang-uml)
-[![Version](https://img.shields.io/badge/version-0.3.9-blue)](https://github.com/bkryza/clang-uml/releases)
+[![Version](https://img.shields.io/badge/version-0.4.0-blue)](https://github.com/bkryza/clang-uml/releases)
 [![Version](https://img.shields.io/badge/LLVM-12,13,14,15,16-orange)](https://github.com/bkryza/clang-uml/releases)
 [![Doxygen](https://img.shields.io/badge/Docs-Doxygen-gainsboro)](https://clang-uml.github.io)
 
diff --git a/docs/installation.md b/docs/installation.md
index 93c5af1e..715f0062 100644
--- a/docs/installation.md
+++ b/docs/installation.md
@@ -20,7 +20,7 @@
 #### Ubuntu
 
 ```bash
-# Currently supported Ubuntu versions are Focal, Jammy and Kinetic
+# Currently supported Ubuntu versions are Focal, Jammy and Lunar
 sudo add-apt-repository ppa:bkryza/clang-uml
 sudo apt update
 sudo apt install clang-uml
@@ -30,16 +30,16 @@ sudo apt install clang-uml
 
 ```bash
 # Fedora 36
-wget https://github.com/bkryza/clang-uml/releases/download/0.3.9/clang-uml-0.3.9-1.fc36.x86_64.rpm
-sudo dnf install ./clang-uml-0.3.9-1.fc36.x86_64.rpm
+wget https://github.com/bkryza/clang-uml/releases/download/0.4.0/clang-uml-0.4.0-1.fc36.x86_64.rpm
+sudo dnf install ./clang-uml-0.4.0-1.fc36.x86_64.rpm
 
 # Fedora 37
-wget https://github.com/bkryza/clang-uml/releases/download/0.3.9/clang-uml-0.3.9-1.fc37.x86_64.rpm
-sudo dnf install ./clang-uml-0.3.9-1.fc37.x86_64.rpm
+wget https://github.com/bkryza/clang-uml/releases/download/0.4.0/clang-uml-0.4.0-1.fc37.x86_64.rpm
+sudo dnf install ./clang-uml-0.4.0-1.fc37.x86_64.rpm
 
 # Fedora 38
-wget https://github.com/bkryza/clang-uml/releases/download/0.3.9/clang-uml-0.3.9-1.fc38.x86_64.rpm
-sudo dnf install ./clang-uml-0.3.9-1.fc38.x86_64.rpm
+wget https://github.com/bkryza/clang-uml/releases/download/0.4.0/clang-uml-0.4.0-1.fc38.x86_64.rpm
+sudo dnf install ./clang-uml-0.4.0-1.fc38.x86_64.rpm
 ```
 
 #### Conda
@@ -161,7 +161,7 @@ bin\clang-uml.exe --version
 ```
 It should produce something like:
 ```bash
-clang-uml 0.3.9
+clang-uml 0.4.0
 Copyright (C) 2021-2023 Bartek Kryza <bkryza@gmail.com>
 Built against LLVM/Clang libraries version: 15.0.6
 Using LLVM/Clang libraries version: clang version 15.0.6 (https://github.com/llvm/llvm-project.git 088f33605d8a61ff519c580a71b1dd57d16a03f8)