diff --git a/CHANGELOG b/CHANGELOG
index 81aad0a..349c9aa 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+v0.4 (unreleased):
+
+- ...
+
 v0.3 (released March 24, 2019):
 
 - Added various new features to the WikiProjectTagger task.
diff --git a/docs/conf.py b/docs/conf.py
index 9b635ab..af1e53b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -48,9 +48,9 @@ copyright = u'2009-2016 Ben Kurtovic'
 # built documents.
 #
 # The short X.Y version.
-version = '0.3'
+version = '0.4'
 # The full version, including alpha/beta/rc tags.
-release = '0.3'
+release = '0.4.dev0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/docs/index.rst b/docs/index.rst
index 3c4e3bc..a885d0f 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -1,4 +1,4 @@
-EarwigBot v0.3 Documentation
+EarwigBot v0.4 Documentation
 ============================
 
 EarwigBot_ is a Python_ robot that edits Wikipedia_ and interacts with people
diff --git a/earwigbot/__init__.py b/earwigbot/__init__.py
index 9c28649..afbf228 100644
--- a/earwigbot/__init__.py
+++ b/earwigbot/__init__.py
@@ -32,7 +32,7 @@ details. This documentation is also available `online
 __author__ = "Ben Kurtovic"
 __copyright__ = "Copyright (C) 2009-2019 Ben Kurtovic"
 __license__ = "MIT License"
-__version__ = "0.3"
+__version__ = "0.4.dev0"
 __email__ = "ben.kurtovic@gmail.com"
 __release__ = False