diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0c2f749..52dd6e4 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]
+
+## [0.5.6] - 2020-02-19
 ### Added
 - Added CMake Find modules for aom, dav1d, rav1e (cryptomilk)
 
@@ -294,7 +296,8 @@
 - Constants `AVIF_VERSION`, `AVIF_VERSION_MAJOR`, `AVIF_VERSION_MINOR`, `AVIF_VERSION_PATCH`
 - `avifVersion()` function
 
-[Unreleased]: https://github.com/AOMediaCodec/libavif/compare/v0.5.5...HEAD
+[Unreleased]: https://github.com/AOMediaCodec/libavif/compare/v0.5.6...HEAD
+[0.5.6]: https://github.com/AOMediaCodec/libavif/compare/v0.5.5...v0.5.6
 [0.5.5]: https://github.com/AOMediaCodec/libavif/compare/v0.5.4...v0.5.5
 [0.5.4]: https://github.com/AOMediaCodec/libavif/compare/v0.5.3...v0.5.4
 [0.5.3]: https://github.com/AOMediaCodec/libavif/compare/v0.5.2...v0.5.3
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b169e30..2354a37 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,11 +3,11 @@
 
 cmake_minimum_required(VERSION 3.5)
 
-# Specify search path for CMake modules to be loaded by include() 
+# Specify search path for CMake modules to be loaded by include()
 # and find_package()
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
 
-project(libavif LANGUAGES C VERSION 0.5.5)
+project(libavif LANGUAGES C VERSION 0.5.6)
 
 # SOVERSION scheme: CURRENT.AGE.REVISION
 #   If there was an incompatible interface change:
@@ -16,7 +16,7 @@
 #     Increment AGE. Set REVISION to 0
 #   If the source code was changed, but there were no interface changes:
 #     Increment REVISION.
-set(LIBRARY_VERSION "0.1.5")
+set(LIBRARY_VERSION "0.1.6")
 set(LIBRARY_SOVERSION "0")
 
 if(CMAKE_C_COMPILER_ID MATCHES "GNU")
diff --git a/include/avif/avif.h b/include/avif/avif.h
index 6051065..2961905 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 5
+#define AVIF_VERSION_PATCH 6
 #define AVIF_VERSION (AVIF_VERSION_MAJOR * 10000) + (AVIF_VERSION_MINOR * 100) + AVIF_VERSION_PATCH
 
 typedef int avifBool;