diff --git a/CHANGELOG.md b/CHANGELOG.md
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+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## [5.2.0-alpha-001] - 2022-11-30
+
+### Changed
+* Introduce custom internal syntax tree. [#2626](https://github.com/fsprojects/fantomas/pull/2626) 
+
 ## [5.1.4] - 2022-11-30
 
 ### Fixed