diff --git a/CHANGES.rst b/CHANGES.rst
index 35d6bd4..34e3fc6 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 Changelog
 ==========
 
+1.2.1 (unreleased)
+------------------
+
+- Nothing changed yet.
+
+
 1.2.0 (2020-05-20)
 ------------------
 
diff --git a/multiping.py b/multiping.py
index 360e129..113e514 100755
--- a/multiping.py
+++ b/multiping.py
@@ -28,7 +28,7 @@
 from time import time, strftime, localtime, sleep
 import os
 
-__version__ = '1.2.0'
+__version__ = '1.2.1.dev0'
 __author__ = 'Marius Gedminas <marius@gedmin.as>'
 __url__ = 'https://github.com/mgedmin/scripts/blob/master/multiping.py'
 __licence__ = 'GPL v2 or later'