diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index b4c9bcbe2..ad9b63d26 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.15.0
+current_version = 0.15.1.dev
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\.(?P<release>[a-z0-9]+))?
 tag_name = {new_version}
 allow_dirty = True
diff --git a/kubespawner/__init__.py b/kubespawner/__init__.py
index 43faa7411..db81ca689 100644
--- a/kubespawner/__init__.py
+++ b/kubespawner/__init__.py
@@ -14,5 +14,5 @@
 
 from kubespawner.spawner import KubeSpawner
 
-__version__ = '0.15.0'
+__version__ = '0.15.1.dev'
 __all__ = [KubeSpawner]
diff --git a/setup.py b/setup.py
index a99629292..65cd7c59d 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
 
 setup(
     name='jupyterhub-kubespawner',
-    version='0.15.0',
+    version='0.15.1.dev',
     install_requires=[
         'async_generator>=1.8',
         'escapism',