diff --git a/src/oemof/solph/__init__.py b/src/oemof/solph/__init__.py
index ab45cf3e6..e9c067e1c 100644
--- a/src/oemof/solph/__init__.py
+++ b/src/oemof/solph/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "0.6.0a2"
+__version__ = "0.6.0a3"
 
 from . import buses
 from . import components