diff --git a/CHANGELOG.md b/CHANGELOG.md
index d7727f42..741ce23c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased
+## [5.1.1] - 2024-12-13
 
 BUG: restore IDEs' ability to obtain IO API docstrings by avoiding dynamic string interpolations
 
diff --git a/README.md b/README.md
index bb85936d..1a8374d6 100644
--- a/README.md
+++ b/README.md
@@ -376,14 +376,14 @@ following configuration (add to `.pre-commit-config.yaml`)
 
 ```yaml
   - repo: https://github.com/neutrinoceros/inifix.git
-    rev: v5.1.0
+    rev: v5.1.1
     hooks:
       - id: inifix-validate
 ```
 or
 ```yaml
   - repo: https://github.com/neutrinoceros/inifix.git
-    rev: v5.1.0
+    rev: v5.1.1
     hooks:
       - id: inifix-format
 ```
@@ -392,7 +392,7 @@ Note that `inifix-format` also validates data by default, so it is redundant to
 utilize both hooks. Validation and formatting may nonetheless be decoupled as
 ```patch
   - repo: https://github.com/neutrinoceros/inifix.git
-    rev: v5.1.0
+    rev: v5.1.1
     hooks:
     - id: inifix-validate
     - id: inifix-format
diff --git a/pyproject.toml b/pyproject.toml
index 6545391c..57196c67 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "inifix"
-version = "5.1.0"
+version = "5.1.1"
 description = "An I/O library for Pluto-style ini files."
 authors = [
     { name = "C.M.T. Robert" },
diff --git a/uv.lock b/uv.lock
index 8ade131c..32af0129 100644
--- a/uv.lock
+++ b/uv.lock
@@ -121,7 +121,7 @@ wheels = [
 
 [[package]]
 name = "inifix"
-version = "5.1.0"
+version = "5.1.1"
 source = { editable = "." }
 dependencies = [
     { name = "typing-extensions", marker = "python_full_version < '3.11'" },