diff --git a/CHANGELOG.md b/CHANGELOG.md
index 78c4860..e9bf4ff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## [v0.4.0](https://github.com/k1LoW/smtptest/compare/v0.3.0...v0.4.0) (2022-04-26)
+
+* [BREKING] Make Close() interface the same as that of httptest [#4](https://github.com/k1LoW/smtptest/pull/4) ([k1LoW](https://github.com/k1LoW))
+
 ## [v0.3.0](https://github.com/k1LoW/smtptest/compare/v0.2.0...v0.3.0) (2022-04-26)
 
 * Add NewServerWithAuth [#3](https://github.com/k1LoW/smtptest/pull/3) ([k1LoW](https://github.com/k1LoW))