diff --git a/setup.py b/setup.py
index dc56ee882d12e85791ccce9874f138aa3b2ee854..3d02e8eefb5b21009f5186d2a4e7695ac83f1e76 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@ with open("README.md", "r", encoding="utf-8") as fh:
 
 setup(
     name='jupyter-openbis-extension',
-    version= '0.4.0',
+    version= '0.4.0.dev3',
     author='Swen Vermeul |  ID SIS | ETH Zürich',
     author_email='swen@ethz.ch',
     description='Extension for Jupyter notebooks to connect to openBIS and download/upload datasets, inluding the notebook itself',