diff --git a/jupyter_launcher_shortcuts/_version.py b/jupyter_launcher_shortcuts/_version.py
index 1e1fb61..63fb940 100644
--- a/jupyter_launcher_shortcuts/_version.py
+++ b/jupyter_launcher_shortcuts/_version.py
@@ -1,4 +1,4 @@
 # __version__ should be updated using tbump, based on configuration in
 # pyproject.toml, according to instructions in RELEASE.md.
 #
-__version__ = "4.0.3"
+__version__ = "4.0.4-0.dev"
diff --git a/labextension/package.json b/labextension/package.json
index 48e0a20..19f50df 100644
--- a/labextension/package.json
+++ b/labextension/package.json
@@ -1,6 +1,6 @@
 {
     "name": "jupyterlab-launcher-shortcuts",
-    "version": "4.0.3",
+    "version": "4.0.4-0.dev",
     "description": "Provide arbitrary shortcuts for apps in JupyterLab",
     "keywords": [
         "jupyter",
diff --git a/pyproject.toml b/pyproject.toml
index 232cab5..69cc045 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "jupyter-launcher-shortcuts"
-version = "4.0.3"
+version = "4.0.4-0.dev"
 readme = "README.md"
 license = { file = "LICENSE" }
 requires-python = ">=3.8"
@@ -115,7 +115,7 @@ ignore = ["W002"]
 github_url = "https://github.com/2i2c-org/jupyter-launcher-shortcuts"
 
 [tool.tbump.version]
-current = "4.0.3"
+current = "4.0.4-0.dev"
 regex = '''
     (?P<major>\d+)
     \.