diff --git a/CHANGES.rst b/CHANGES.rst
index 403db6a..917ebac 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,7 +1,7 @@
 Changelog
 =========
 
-4.0.0 (unreleased)
+4.0.0 (2024-10-17)
 ------------------
 
 - Remove CGI support if you're using Python 3.13 or newer.  You'll have to
diff --git a/src/irclog2html/_version.py b/src/irclog2html/_version.py
index b21611f..fc831ed 100644
--- a/src/irclog2html/_version.py
+++ b/src/irclog2html/_version.py
@@ -1,3 +1,3 @@
-__version__ = '4.0.0.dev0'
-__date__ = '2024-10-16'
+__version__ = '4.0.0'
+__date__ = '2024-10-17'
 __homepage__ = 'https://mg.pov.lt/irclog2html/'