diff --git a/setup.py b/setup.py
index 7ee5c261..38f224a9 100644
--- a/setup.py
+++ b/setup.py
@@ -5,6 +5,7 @@
 
 setup(
   name = 'spotpy',
+  version = '1.3.23',
   description = 'A Statistical Parameter Optimization Tool',
   long_description=open(os.path.join(os.path.dirname(__file__),
                                        "README.rst")).read(),