diff --git a/packages/gridstack-editor/package.json b/packages/gridstack-editor/package.json
index 81b1cb6..4a0bbd5 100644
--- a/packages/gridstack-editor/package.json
+++ b/packages/gridstack-editor/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@voila-dashboards/gridstack-editor",
-  "version": "0.1.0",
+  "version": "0.3.0-alpha.0",
   "private": true,
   "files": [
     "lib/**/*.{d.ts,js.map,js}",
diff --git a/packages/jupyterlab-gridstack/package.json b/packages/jupyterlab-gridstack/package.json
index 1bac8be..05a31d4 100644
--- a/packages/jupyterlab-gridstack/package.json
+++ b/packages/jupyterlab-gridstack/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@voila-dashboards/jupyterlab-gridstack",
-  "version": "0.2.0",
+  "version": "0.3.0-alpha.0",
   "description": "A JupyterLab extension to create Voila dashboards using GridStack",
   "homepage": "https://github.com/voila-dashboards/voila-gridstack",
   "repository": {
diff --git a/pyproject.toml b/pyproject.toml
index c90a614..07ad74f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ build_cmd = "build:prod"
 npm = ["jlpm"]
 
 [tool.tbump.version]
-current = "0.2.0"
+current = "0.3.0a0"
 regex = '''
   (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)
   ((?P<channel>a|b|rc|.dev)(?P<release>\d+))?
diff --git a/voila_gridstack/__init__.py b/voila_gridstack/__init__.py
index 059ea67..3da20d0 100644
--- a/voila_gridstack/__init__.py
+++ b/voila_gridstack/__init__.py
@@ -11,7 +11,7 @@
 import os.path as osp
 from .server_extension import load_jupyter_server_extension  # noqa
 
-__version__ = "0.2.0"
+__version__ = "0.3.0a0"
 
 HERE = osp.abspath(osp.dirname(__file__))