diff --git a/CHANGELOG.md b/CHANGELOG.md
index e6df0af1..78b9a00f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 <!-- next-header -->
 ## [Unreleased] - ReleaseDate
 
+## [0.12.1] - 2025-09-02
+
 ### Fixes
 
 - Correctly calculate line number width when feature `simd` is enabled #286
@@ -210,7 +212,8 @@ Note that the top-level type changed from `Message` to `Report`.
 - Update the syntax to Rust 2018 idioms. (#4)
 
 <!-- next-url -->
-[Unreleased]: https://github.com/rust-lang/annotate-snippets-rs/compare/0.12.0...HEAD
+[Unreleased]: https://github.com/rust-lang/annotate-snippets-rs/compare/0.12.1...HEAD
+[0.12.1]: https://github.com/rust-lang/annotate-snippets-rs/compare/0.12.0...0.12.1
 [0.12.0]: https://github.com/rust-lang/annotate-snippets-rs/compare/0.11.5...0.12.0
 [0.11.5]: https://github.com/rust-lang/annotate-snippets-rs/compare/0.11.4...0.11.5
 [0.11.4]: https://github.com/rust-lang/annotate-snippets-rs/compare/0.11.3...0.11.4
diff --git a/Cargo.lock b/Cargo.lock
index 3354a6c0..4edad378 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,7 +4,7 @@ version = 3
 
 [[package]]
 name = "annotate-snippets"
-version = "0.12.0"
+version = "0.12.1"
 dependencies = [
  "annotate-snippets",
  "anstream",
diff --git a/Cargo.toml b/Cargo.toml
index 95f7855e..1069014b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -96,7 +96,7 @@ lto = true
 
 [package]
 name = "annotate-snippets"
-version = "0.12.0"
+version = "0.12.1"
 description = "Library for building code annotations"
 categories = []
 keywords = ["code", "analysis", "ascii", "errors", "debug"]