diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5108918..f29926b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,12 @@ Sections:
 
 ---
 
+## [0.5.9] - 2026-01-17
+
+### Changed
+- README is now collapsible with a preview by default (Show more / Show less).
+- Improved mobile readability by keeping long README content contained without affecting the page layout.
+
 ## [0.5.8] - 2026-01-17
 
 ### Changed