diff --git a/CHANGES.rst b/CHANGES.rst
index fc53d86..9b35467 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,7 +1,10 @@
 Changes
 =======
 
-In next release ...
+4.5.1 (2024-01-28)
+------------------
+
+- Add Python 3.13 classifier.
 
 - Fix a regression where `default_extension` was no longer permitted
   as a positional argument to `PageTemplateLoader`.
diff --git a/setup.py b/setup.py
index 6fefa27..b30ac53 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-__version__ = '4.5.1-dev'
+__version__ = '4.5.1'
 
 import os