diff --git a/aiida_python/__init__.py b/aiida_python/__init__.py
index 60b554a..45c762e 100644
--- a/aiida_python/__init__.py
+++ b/aiida_python/__init__.py
@@ -1,2 +1,4 @@
 # -*- coding: utf-8 -*-
 from .serializers import *
+
+__version__ = '0.0.0'