diff --git a/ChangeLog.md b/ChangeLog.md
index 67aa911bb5fc..515f9fdc1d90 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,4 +1,4 @@
-# 10.2.1 - TBD
+# 10.2.1 - 2024-01-03
 
 -   Fixed ABI compatibility with earlier 10.x versions
     (https://github.com/fmtlib/fmt/pull/3786). Thanks @saraedum.
diff --git a/doc/build.py b/doc/build.py
index a6ae8f8500e5..e50519a6e928 100755
--- a/doc/build.py
+++ b/doc/build.py
@@ -9,7 +9,7 @@
   '5.2.0', '5.2.1', '5.3.0', '6.0.0', '6.1.0', '6.1.1', '6.1.2', '6.2.0',
   '6.2.1', '7.0.0', '7.0.1', '7.0.2', '7.0.3', '7.1.0', '7.1.1', '7.1.2',
   '7.1.3', '8.0.0', '8.0.1', '8.1.0', '8.1.1', '9.0.0', '9.1.0']
-versions += ['10.0.0', '10.1.0', '10.1.1', '10.1.1', '10.2.0']
+versions += ['10.0.0', '10.1.0', '10.1.1', '10.1.1', '10.2.0', '10.2.1']
 
 class Pip:
   def __init__(self, venv_dir):