diff --git a/CHANGES.rst b/CHANGES.rst
index c456f37b..47868356 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -19,8 +19,8 @@ Release History
    - Bugfixes
    - Documentation
 
-0.4.3 (unreleased)
-==================
+0.4.3 (June 28, 2018)
+=====================
 
 - Bugfix: thread-safety for jedi autocompletion
 - Bugfix: Handle authentication when connecting to multiple servers
diff --git a/nengo_gui/version.py b/nengo_gui/version.py
index 337c36a5..6032d025 100644
--- a/nengo_gui/version.py
+++ b/nengo_gui/version.py
@@ -8,7 +8,7 @@
 
 name = "nengo_gui"
 version_info = (0, 4, 3)  # (major, minor, patch)
-dev = 0
+dev = None
 
 version = "{v}{dev}".format(v='.'.join(str(v) for v in version_info),
                             dev=('.dev%d' % dev) if dev is not None else '')