diff --git a/CHANGES.rst b/CHANGES.rst
index 138ef8ab..09bdfb46 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+3.4.1 (unreleased)
+------------------
+
+- Nothing changed yet.
+
+
 3.4 (2020-06-16)
 ----------------
 
diff --git a/setup.py b/setup.py
index e643607b..98e40bf5 100644
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@
 
 import os
 
-version = '3.4'
+version = '3.4.1.dev0'
 
 
 def read(*rnames):