diff --git a/setup.py b/setup.py
index 13ed6bb2..ea39f04a 100644
--- a/setup.py
+++ b/setup.py
@@ -665,7 +665,7 @@ def fortran_extensionlists(self):
 NAME = "Assimulo"
 AUTHOR = u"C. Winther (Andersson), C. Führer, J. Åkesson, M. Gäfvert"
 AUTHOR_EMAIL = "christian.winther@modelon.com"
-VERSION = "master" if version_number_arg == "Default" else version_number_arg
+VERSION = "3.5.0" if version_number_arg == "Default" else version_number_arg
 LICENSE = "LGPL"
 URL = "http://www.jmodelica.org/assimulo"
 DOWNLOAD_URL = "http://www.jmodelica.org/assimulo"