diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2a939a7..c67d340 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## [unreleased]
+## [0.4.0] - 2016-07-24
 
 ## Breaking changes
 - While in early stages, doing some renaming of modules to suit the longer term. `federation.controllers` has been split into two, `federation.outbound` and `federation.inbound`. The following methods have new import locations:
diff --git a/federation/__init__.py b/federation/__init__.py
index f9aa3e1..6a9beea 100644
--- a/federation/__init__.py
+++ b/federation/__init__.py
@@ -1 +1 @@
-__version__ = "0.3.2"
+__version__ = "0.4.0"