diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2dde660..38d7548 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -38,8 +38,8 @@ include(CMakeDependentOption)
 
 project(gmio)
 set(GMIO_VERSION_MAJOR 0)
-set(GMIO_VERSION_MINOR 3)
-set(GMIO_VERSION_PATCH 2)
+set(GMIO_VERSION_MINOR 4)
+set(GMIO_VERSION_PATCH 0)
 set(GMIO_VERSION
     ${GMIO_VERSION_MAJOR}.${GMIO_VERSION_MINOR}.${GMIO_VERSION_PATCH})
 
diff --git a/README.md b/README.md
index 20bb877..7082478 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@
 </a>
 [![Coverage Status](https://coveralls.io/repos/fougue/gmio/badge.svg?branch=master&service=github)](https://coveralls.io/github/fougue/gmio?branch=master) 
 [![License](https://img.shields.io/badge/license-BSD%202--clause-blue.svg)](https://github.com/fougue/gmio/blob/master/LICENSE.txt)
-[![Version](https://img.shields.io/badge/version-v0.3.2-blue.svg?style=flat)](https://github.com/fougue/gmio/releases)  
+[![Version](https://img.shields.io/badge/version-v0.4.0-blue.svg?style=flat)](https://github.com/fougue/gmio/releases)  
 
 
 C library for geometry input/output
@@ -29,7 +29,7 @@ Main highlights:
   * [x] Progress report about the I/O operation
 
 Current version only supports the STereoLithography format(STL), see module
-[gmio_stl](http://www.fougue.pro/docs/gmio/0.3/group__gmio__stl.html#details)
+[gmio_stl](http://www.fougue.pro/docs/gmio/0.4/group__gmio__stl.html#details)
 
 
 Building gmio
@@ -43,7 +43,7 @@ Read the [Build instructions](https://github.com/fougue/gmio/wiki/2.-Build-instr
 Documentation
 =============
 
-The HTML reference manual generated by Doxygen is [here](http://www.fougue.pro/docs/gmio/0.3)
+The HTML reference manual generated by Doxygen is [here](http://www.fougue.pro/docs/gmio/0.4)
 
 There is also a [wiki](https://github.com/fougue/gmio/wiki)
 
diff --git a/appveyor.yml b/appveyor.yml
index 756b9cc..7d94b39 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 0.3_build{build}
+version: 0.4_build{build}
 
 os: Visual Studio 2013