diff --git a/app-openbis-command-line/src/python/HOWTO_UPLOAD_TO_PYPI b/app-openbis-command-line/src/python/HOWTO_UPLOAD_TO_PYPI
index 3dd4bdc21e997af64f979ae20eb383167e3a0ab9..fbdd1056faeab89fedc12625f25d9028ff8589f4 100644
--- a/app-openbis-command-line/src/python/HOWTO_UPLOAD_TO_PYPI
+++ b/app-openbis-command-line/src/python/HOWTO_UPLOAD_TO_PYPI
@@ -1,6 +1,6 @@
 # create a source-distribution
 # be sure to bump you version number up!
-python setup.py sdist
+python3 setup.py sdist
 
 # see distributions
 ls -la dist/
diff --git a/app-openbis-command-line/src/python/obis/__init__.py b/app-openbis-command-line/src/python/obis/__init__.py
index b777e4b2c02da1543f79f1adb947bbb599908c82..d3ea1e87c10bdb123e4416bfec8258f21577cfc2 100644
--- a/app-openbis-command-line/src/python/obis/__init__.py
+++ b/app-openbis-command-line/src/python/obis/__init__.py
@@ -14,6 +14,6 @@
 #
 __author__ = "ID SIS • ETH Zürich"
 __email__ = "openbis-support@id.ethz.ch"
-__version__ = "0.4.0rc3"
+__version__ = "0.4.0rc4"
 
 from .dm import *
diff --git a/app-openbis-command-line/src/python/setup.py b/app-openbis-command-line/src/python/setup.py
index 31780493474da1adfa9163e5a692f2c0ddf5e978..138cab8e689704ee04a84489e41277f37023b0f1 100644
--- a/app-openbis-command-line/src/python/setup.py
+++ b/app-openbis-command-line/src/python/setup.py
@@ -31,7 +31,7 @@ data_files = [
 
 setup(
     name="obis",
-    version="0.4.0rc3",
+    version="0.4.0rc4",
     description="Local data management with assistance from OpenBIS.",
     long_description=long_description,
     long_description_content_type="text/markdown",