diff --git a/src/oemof/solph/__init__.py b/src/oemof/solph/__init__.py
index b275f6168..cbfc8c955 100644
--- a/src/oemof/solph/__init__.py
+++ b/src/oemof/solph/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "0.5.6a1"
+__version__ = "0.5.6"
 
 from . import buses
 from . import components