diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 60810ab..198b5b4 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,4 +1,4 @@
 [bumpversion]
-current_version = 0.4.0b1
+current_version = 0.4.0
 files = properties/__init__.py setup.py docs/conf.py
 
diff --git a/docs/conf.py b/docs/conf.py
index ab95ca6..a175f97 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -64,9 +64,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = u'0.4.0b1'
+version = u'0.4.0'
 # The full version, including alpha/beta/rc tags.
-release = u'0.4.0b1'
+release = u'0.4.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/properties/__init__.py b/properties/__init__.py
index a8222db..ba8cac5 100644
--- a/properties/__init__.py
+++ b/properties/__init__.py
@@ -88,7 +88,7 @@ class Profile(properties.HasProperties):
     undefined,
 )
 
-__version__ = '0.4.0b1'
+__version__ = '0.4.0'
 __author__ = 'Seequent'
 __license__ = 'MIT'
 __copyright__ = 'Copyright 2018 Seequent'
diff --git a/setup.py b/setup.py
index b155a91..807a225 100644
--- a/setup.py
+++ b/setup.py
@@ -29,7 +29,7 @@
 EXTRAS.update({'full': sum(EXTRAS.values(), [])})
 setup(
     name='properties',
-    version='0.4.0b1',
+    version='0.4.0',
     packages=find_packages(exclude=('tests',)),
     install_requires=['six'],
     extras_require=EXTRAS,