diff --git a/riotctrl/__init__.py b/riotctrl/__init__.py
index d079194..61e9650 100644
--- a/riotctrl/__init__.py
+++ b/riotctrl/__init__.py
@@ -8,4 +8,4 @@
 and maybe also over network.
 """
 
-__version__ = '0.3.1'
+__version__ = '0.4.0'