v0.4.2
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c28de21..0e5590a 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]
+
+## [0.4.2] - 2019-10-17
 ### Changed
 - Populate nclx box inside of OBU in addition to AVIF container
 
@@ -195,7 +197,8 @@
 - Constants `AVIF_VERSION`, `AVIF_VERSION_MAJOR`, `AVIF_VERSION_MINOR`, `AVIF_VERSION_PATCH`
 - `avifVersion()` function
 
-[Unreleased]: https://github.com/AOMediaCodec/libavif/compare/v0.4.1...HEAD
+[Unreleased]: https://github.com/AOMediaCodec/libavif/compare/v0.4.2...HEAD
+[0.4.2]: https://github.com/AOMediaCodec/libavif/compare/v0.4.1...v0.4.2
 [0.4.1]: https://github.com/AOMediaCodec/libavif/compare/v0.4.0...v0.4.1
 [0.4.0]: https://github.com/AOMediaCodec/libavif/compare/v0.3.11...v0.4.0
 [0.3.11]: https://github.com/AOMediaCodec/libavif/compare/v0.3.10...v0.3.11
diff --git a/include/avif/avif.h b/include/avif/avif.h
index ca50dc2..576587f 100644
--- a/include/avif/avif.h
+++ b/include/avif/avif.h
@@ -16,7 +16,7 @@
 
 #define AVIF_VERSION_MAJOR 0
 #define AVIF_VERSION_MINOR 4
-#define AVIF_VERSION_PATCH 1
+#define AVIF_VERSION_PATCH 2
 #define AVIF_VERSION (AVIF_VERSION_MAJOR * 10000) + (AVIF_VERSION_MINOR * 100) + AVIF_VERSION_PATCH
 
 typedef int avifBool;