diff --git a/DEVELOPING.md b/DEVELOPING.md
index 46ac9cc1b..71f4caad6 100644
--- a/DEVELOPING.md
+++ b/DEVELOPING.md
@@ -190,4 +190,6 @@ or if you have two-factor authentication enabled: https://pypi.org/help/#apitoke
 
     twine upload dist/* --repository scikit-tree
 
-4. Update version number on ``meson.build`` and ``pyproject.toml`` to the relevant version.
\ No newline at end of file
+4. Update version number on ``meson.build`` and ``pyproject.toml`` to the relevant version.
+
+See https://github.com/neurodata/scikit-tree/pull/160 as an example.
\ No newline at end of file
diff --git a/doc/_static/versions.json b/doc/_static/versions.json
index 5fe32a696..b9dedbaa1 100644
--- a/doc/_static/versions.json
+++ b/doc/_static/versions.json
@@ -1,9 +1,14 @@
 [
     {
-        "name": "0.3 (devel)",
+        "name": "0.4 (devel)",
         "version": "dev",
         "url": "https://docs.neurodata.io/scikit-tree/dev/"
     },
+    {
+        "name": "0.3",
+        "version": "0.3",
+        "url": "https://docs.neurodata.io/scikit-tree/v0.3/"
+    },
     {
         "name": "0.2",
         "version": "0.2",
diff --git a/meson.build b/meson.build
index a63936907..5e21ba68c 100644
--- a/meson.build
+++ b/meson.build
@@ -4,7 +4,7 @@ project(
   # Note that the git commit hash cannot be added dynamically here
   # That only happens when importing from a git repository.
   # See `sktree/__init__.py`
-  version: '0.3.0',
+  version: '0.4.0dev0',
   license: 'BSD-3',
   meson_version: '>= 0.64.0',
   default_options: [
diff --git a/pyproject.toml b/pyproject.toml
index 9fb1ddce5..d7d68a751 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ name = "scikit-tree"
 # 0.0.0 is standard placeholder for poetry-dynamic-versioning
 # any changes to this should not be checked in
 #
-version = "0.3.0"
+version = "0.4.0dev0"
 description = "Modern decision trees in Python"
 maintainers = [
     {name="Neurodata", email="adam.li@columbia.edu"}
diff --git a/sktree/__init__.py b/sktree/__init__.py
index b6e906702..f97d9eec6 100644
--- a/sktree/__init__.py
+++ b/sktree/__init__.py
@@ -3,7 +3,7 @@
 import os
 import sys
 
-__version__ = "0.3.0dev0"
+__version__ = "0.4dev0"
 logger = logging.getLogger(__name__)