diff --git a/nutree/__init__.py b/nutree/__init__.py
index 013e163..4c6f2d2 100644
--- a/nutree/__init__.py
+++ b/nutree/__init__.py
@@ -16,7 +16,7 @@
 """
 
 # flake8: noqa
-__version__ = "0.8.1-a1"
+__version__ = "0.9.0"
 
 from .common import (
     AmbiguousMatchError,