diff --git a/setup.py b/setup.py
index 0a13ba3..1edb99f 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,6 @@
 from setuptools import setup
 
-version = '1.0.0-dev'
+version = '1.0.0'
 description = 'Type system extensions for programs checked with the mypy type checker.'
 long_description = '''
 Mypy Extensions