diff --git a/kmax/about.py b/kmax/about.py
index fce03c53..680faedf 100644
--- a/kmax/about.py
+++ b/kmax/about.py
@@ -1,2 +1,2 @@
 __title__ = "kmax"
-__version__ = "4.0"
+__version__ = "4.1-rc1"