diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5fbf948c..d62b98a0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,18 @@
 All notable changes to this project will be documented in this file.
 
-## [0.21.0 - 2024-1x-xx]
+## [0.21.0 - 2024-11-29]
+
+### Added
+
+- Allow specifying encoder parameters for non-primary images in image sequence. #313
 
 ### Changed
 
-- libheif updated from `1.18.2` to `1.19.3` version.
+- libheif updated from `1.18.2` to `1.19.5` version. #312
+
+### Fixed
+
+- Error `argument '-Ofast' is deprecated` when building from source. #305
 
 ## [0.20.0 - 2024-10-19]
 
diff --git a/pillow_heif/_version.py b/pillow_heif/_version.py
index 0a3d8ca6..04be03c5 100644
--- a/pillow_heif/_version.py
+++ b/pillow_heif/_version.py
@@ -1,3 +1,3 @@
 """Version of pillow_heif/pi_heif."""
 
-__version__ = "0.21.0.dev0"
+__version__ = "0.21.0"