diff --git a/lxc_backup.sh b/lxc_backup.sh
index dc0d8d6..67ccaa6 100755
--- a/lxc_backup.sh
+++ b/lxc_backup.sh
@@ -27,8 +27,8 @@ do
 	${lxccmd} delete ${container}-backup
 done
 
-#housekeeping - keep last 38 days
-find ${backuppath} -mtime +38 -exec rm -f ${backuppath}/{} \;
+#housekeeping - keep last 28 days
+find ${backuppath} -mtime +28 -exec rm -f {} \;
 
 #own data for backupuser
 chown -R ${backupuser}:${backupuser} ${backuppath}