diff --git a/pyproject.toml b/pyproject.toml
index 1fe7949..59f2e37 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@
 github_url = "https://github.com/jupyterhub/jupyter-rsession-proxy"
 
 [tool.tbump.version]
-current = "2.3.0"
+current = "2.3.1.dev"
 regex = '''
     (?P<major>\d+)
     \.
diff --git a/setup.py b/setup.py
index a6d35d0..a077e96 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 
 setuptools.setup(
     name="jupyter-rsession-proxy",
-    version='2.3.0',
+    version='2.3.1.dev',
     url="https://github.com/jupyterhub/jupyter-rsession-proxy",
     author="Ryan Lovett & Yuvi Panda",
     description="Jupyter extension to proxy RStudio",