diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1b3092f..408d2cb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## master ##
   * Store mail location in `Mail::Message` object (thanks [Jonathan Chan](https://github.com/jonmchan))
   * Drop Ruby 2 support. Support only Ruby 3.0+
+  * Remove `nkf` gem dependency.
 
 ## 1.8.1 ##
  * Fix duplication of Rails tasks caused by LetterOpener's rake task file. (thanks [zarqman](https://github.com/zarqman))