diff --git a/.nengobones.yml b/.nengobones.yml
index b8d7e33..b325c26 100644
--- a/.nengobones.yml
+++ b/.nengobones.yml
@@ -59,4 +59,4 @@ version_py:
   major: 0
   minor: 4
   patch: 0
-  release: false
+  release: true
diff --git a/CHANGES.rst b/CHANGES.rst
index b7b4736..2db6b87 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -19,9 +19,14 @@ Release history
    - Removed
    - Fixed
 
-0.3.1 (unreleased)
-==================
+0.4.0 (November 10, 2021)
+=========================
 
+**Changed**
+
+- Updated to use KerasLMU 0.4. (`#2`_)
+
+.. _#2: https://github.com/nengo/lmu/pull/2
 
 0.3.0 (November 6, 2020)
 ========================
diff --git a/lmu/version.py b/lmu/version.py
index cd82705..321b4d6 100644
--- a/lmu/version.py
+++ b/lmu/version.py
@@ -13,7 +13,7 @@
 version_info = (0, 4, 0)
 
 name = "lmu"
-dev = 0
+dev = None
 
 # use old string formatting, so that this can still run in Python <= 3.5
 # (since this file is parsed in setup.py, before python_requires is applied)