diff --git a/setup.py b/setup.py
index 5fccadb..18f339e 100755
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
 
 if __name__ == '__main__':
     setup(name='rsa',
-          version='4.0-alpha',
+          version='4.0',
           description='Pure-Python RSA implementation',
           long_description=long_description,
           long_description_content_type='text/markdown',