--- a/docs/Writerside/topics/about.md	Thu Dec 04 18:57:54 2025 +0100
+++ b/docs/Writerside/topics/about.md	Fri Dec 05 16:11:39 2025 +0100
@@ -26,6 +26,10 @@
 
 ## Changelog
 
+### Version 4.0 - preview {collapsible="true"}
+
+* adds cx_system_page_size() to allocator.h
+
 ### Version 3.2 - 2025-11-30 {collapsible="true"}
 
 * adds cxMempoolTransfer() and cxMempoolTransferObject()