diff --git a/CHANGELOG.md b/CHANGELOG.md
index aa583cd..30e3fd5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+## [0.5.1] - 2019-11-21
 ### Changed
 - Fix expectations for Exif payload to better match normal usage
 
@@ -255,7 +257,8 @@
 - Constants `AVIF_VERSION`, `AVIF_VERSION_MAJOR`, `AVIF_VERSION_MINOR`, `AVIF_VERSION_PATCH`
 - `avifVersion()` function
 
-[Unreleased]: https://github.com/AOMediaCodec/libavif/compare/v0.5.0...HEAD
+[Unreleased]: https://github.com/AOMediaCodec/libavif/compare/v0.5.1...HEAD
+[0.5.1]: https://github.com/AOMediaCodec/libavif/compare/v0.5.0...v0.5.1
 [0.5.0]: https://github.com/AOMediaCodec/libavif/compare/v0.4.8...v0.5.0
 [0.4.8]: https://github.com/AOMediaCodec/libavif/compare/v0.4.7...v0.4.8
 [0.4.7]: https://github.com/AOMediaCodec/libavif/compare/v0.4.6...v0.4.7
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b2a8203..c9810c8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: BSD-2-Clause
 
 cmake_minimum_required(VERSION 3.5)
-project(libavif LANGUAGES C VERSION 0.5.0)
+project(libavif LANGUAGES C VERSION 0.5.1)
 
 # SOVERSION scheme: CURRENT.AGE.REVISION
 #   If there was an incompatible interface change:
@@ -11,7 +11,7 @@
 #     Increment AGE. Set REVISION to 0
 #   If the source code was changed, but there were no interface changes:
 #     Increment REVISION.
-set(LIBRARY_VERSION "0.1.0")
+set(LIBRARY_VERSION "0.1.1")
 set(LIBRARY_SOVERSION "0")
 
 if(CMAKE_C_COMPILER_ID MATCHES "GNU")
diff --git a/include/avif/avif.h b/include/avif/avif.h
index 0b9c6b3..4885ee4 100644
--- a/include/avif/avif.h
+++ b/include/avif/avif.h
@@ -16,7 +16,7 @@
 
 #define AVIF_VERSION_MAJOR 0
 #define AVIF_VERSION_MINOR 5
-#define AVIF_VERSION_PATCH 0
+#define AVIF_VERSION_PATCH 1
 #define AVIF_VERSION (AVIF_VERSION_MAJOR * 10000) + (AVIF_VERSION_MINOR * 100) + AVIF_VERSION_PATCH
 
 typedef int avifBool;