diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2791700..fdae6ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,12 +5,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+## [v0.5.3] - 2024-09-24
+
 ### Changed
 
 - Faster spatial sorting of non-uniform points (CPU and GPU).
 
 - Tune GPU parameters: kernel workgroupsize; block size for spatial sorting.
 
+- Plans: `block_size` argument can now be a tuple (block size along each separate dimension).
+
 ## [v0.5.2] - 2024-09-23
 
 ### Changed