diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 2cd03d51..f1df0c85 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.3.5
+current_version = 0.4.0
 message = Bump version to {new_version}
 commit = True
 tag = True
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index aef82f70..0d431326 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -9,6 +9,19 @@ and this project adheres to `Semantic Versioning <https://semver.org/spec/v2.0.0
 Unreleased
 ----------
 
+**Added**
+
+**Changed**
+
+**Fixed**
+
+**Deprecated**
+
+**Removed**
+
+0.4.0
+----------
+
 **Added**
 * Documentation updates
 * rdp libigl function (faster than the regular rdp)
diff --git a/docs/conf.py b/docs/conf.py
index a0a1f374..d422f2e5 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -29,7 +29,7 @@
 year = '2020'
 author = 'Digital Building Technologies, Gramazio Kohler Research'
 copyright = '{0}, {1}'.format(year, author)
-version = release = '0.3.5'
+version = release = '0.4.0'
 
 pygments_style = 'sphinx'
 show_authors = True
diff --git a/docs/doc_versions.txt b/docs/doc_versions.txt
index faeb9903..58fe7e6e 100644
--- a/docs/doc_versions.txt
+++ b/docs/doc_versions.txt
@@ -1,5 +1,6 @@
 latest
 stable
+0.4.0
 0.3.5
 0.3.4
 0.3.3
diff --git a/setup.py b/setup.py
index c4a66fde..19ba3b00 100644
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,7 @@ def read(*names, **kwargs):
 
 setup(
     name="compas_slicer",
-    version="0.3.5",
+    version="0.4.0",
     description="Slicing package for FDM 3D Printing with COMPAS",
     long_description=long_description,
     long_description_content_type="text/markdown",
diff --git a/src/compas_slicer/__init__.py b/src/compas_slicer/__init__.py
index f2f212ea..75eb7e08 100644
--- a/src/compas_slicer/__init__.py
+++ b/src/compas_slicer/__init__.py
@@ -29,7 +29,7 @@
 __copyright__ = 'Copyright 2020 ETH Zurich'
 __license__ = 'MIT License'
 __email__ = 'mitropoulou@arch.ethz.ch'
-__version__ = '0.3.5'
+__version__ = '0.4.0'
 
 
 HERE = os.path.dirname(__file__)