diff --git a/CHANGELOG.md b/CHANGELOG.md
index ebad535..18f43fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - The index now supports whitespace and punctuation folding ([#25](https://github.com/ianlewis/go-stardict/issues/25))
+- The synonym index (.syn) file is now supported ([#2](https://github.com/ianlewis/go-stardict/issues/2))
 - The library now supports Go 1.20+
 
 ## [0.1.0] - 2024-11-04