diff --git a/CHANGELOG.md b/CHANGELOG.md
index c865216..c128d80 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+## [1.2.1] - 2026-09-15
+
 ### Fixed
 
 - Fix a compile error on Erlang/OTP 28+ caused by regexes compiled into
diff --git a/mix.exs b/mix.exs
index ba499bc..6d61de2 100644
--- a/mix.exs
+++ b/mix.exs
@@ -1,7 +1,7 @@
 defmodule Tzdata.Mixfile do
   use Mix.Project
 
-  @version "1.2.0"
+  @version "1.2.1"
 
   def project do
     [