diff --git a/setup.py b/setup.py
index a48a431..dfa869d 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 
 from setuptools import setup
 
-version = '0.5.0-dev'
+version = '0.4.2'
 description = 'Experimental type system extensions for programs checked with the mypy typechecker.'
 long_description = '''
 Mypy Extensions