diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index ca58abf..f8ed650 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,7 +1,7 @@
 Python-RSA changelog
 ========================================
 
-Version 4.0 - in development
+Version 4.0 - released 2018-09-16
 ----------------------------------------
 
 - Removed deprecated modules:
diff --git a/doc/conf.py b/doc/conf.py
index f209a4d..3331a86 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -46,7 +46,7 @@
 
 # General information about the project.
 project = u'Python-RSA'
-copyright = u'2011-2017, Sybren A. Stüvel'
+copyright = u'2011-2018, Sybren A. Stüvel'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
diff --git a/rsa/__init__.py b/rsa/__init__.py
index ce3a341..9b05c6c 100644
--- a/rsa/__init__.py
+++ b/rsa/__init__.py
@@ -28,8 +28,8 @@
     VerificationError, find_signature_hash,  sign_hash, compute_hash
 
 __author__ = "Sybren Stuvel, Barry Mead and Yesudeep Mangalapilly"
-__date__ = "2016-03-29"
-__version__ = '4.0-alpha'
+__date__ = "2018-09-16"
+__version__ = '4.0'
 
 # Do doctest if we're run directly
 if __name__ == "__main__":
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',