diff --git a/setup.py b/setup.py
index afdfea7..241ef1d 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@ def has_ext_modules(self):
 
 setup(
     name='array_record',
-    version='0.4.2',
+    version='0.5.0',
     description='A file format that achieves a new frontier of IO efficiency',
     author='ArrayRecord team',
     author_email='no-reply@google.com',