diff --git a/setup.py b/setup.py
index eae4f5d5..4ab2b002 100644
--- a/setup.py
+++ b/setup.py
@@ -74,7 +74,7 @@ def build_extension(self, ext):
 # README file as long_description.
 long_description = open('README.md', encoding='utf-8').read()
 
-__version__ = '0.8.0'
+__version__ = '0.9.0'
 
 setup(
     name='qsimcirq',