diff -r 5e608d0e5bd1 -r 56731bb98508 docs/Writerside/topics/about.md
--- a/docs/Writerside/topics/about.md	Wed Dec 31 14:58:52 2025 +0100
+++ b/docs/Writerside/topics/about.md	Wed Dec 31 15:11:12 2025 +0100
@@ -26,7 +26,7 @@
 
 ## Changelog
 
-### Version 4.0 - preview {collapsible="true"}
+### Version 4.0 - 2025-12-31 {collapsible="true"}
 
 * adds cx_system_page_size() to allocator.h
 * adds cx_compare_func2 function pointer that supports compare functions with custom data