v0.3.9
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2edcc7e..9979fdc 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]
+
+## [0.3.9] - 2019-09-25
 ### Changed
 - Split avifRawData and avifStream into read-only (const) and read/write versions, updated code accordingly
 - Fix a few clang/macOS warnings
@@ -149,7 +151,8 @@
 - Constants `AVIF_VERSION`, `AVIF_VERSION_MAJOR`, `AVIF_VERSION_MINOR`, `AVIF_VERSION_PATCH`
 - `avifVersion()` function
 
-[Unreleased]: https://github.com/AOMediaCodec/libavif/compare/v0.3.8...HEAD
+[Unreleased]: https://github.com/AOMediaCodec/libavif/compare/v0.3.9...HEAD
+[0.3.9]: https://github.com/AOMediaCodec/libavif/compare/v0.3.8...v0.3.9
 [0.3.8]: https://github.com/AOMediaCodec/libavif/compare/v0.3.7...v0.3.8
 [0.3.7]: https://github.com/AOMediaCodec/libavif/compare/v0.3.6...v0.3.7
 [0.3.6]: https://github.com/AOMediaCodec/libavif/compare/v0.3.5...v0.3.6
diff --git a/include/avif/avif.h b/include/avif/avif.h
index fbb380b..1e0edd1 100644
--- a/include/avif/avif.h
+++ b/include/avif/avif.h
@@ -16,7 +16,7 @@
 
 #define AVIF_VERSION_MAJOR 0
 #define AVIF_VERSION_MINOR 3
-#define AVIF_VERSION_PATCH 8
+#define AVIF_VERSION_PATCH 9
 #define AVIF_VERSION (AVIF_VERSION_MAJOR * 10000) + (AVIF_VERSION_MINOR * 100) + AVIF_VERSION_PATCH
 
 typedef int avifBool;