diff --git a/zfs_autobackup/ZfsAutobackup.py b/zfs_autobackup/ZfsAutobackup.py
index bc2080d..6520003 100644
--- a/zfs_autobackup/ZfsAutobackup.py
+++ b/zfs_autobackup/ZfsAutobackup.py
@@ -16,7 +16,7 @@ from zfs_autobackup.ThinnerRule import ThinnerRule
 class ZfsAutobackup:
     """main class"""
 
-    VERSION = "3.1-rc3"
+    VERSION = "3.1-rc4"
     HEADER = "zfs-autobackup v{} - (c)2021 E.H.Eefting (edwin@datux.nl)".format(VERSION)
 
     def __init__(self, argv, print_arguments=True):