diff --git a/README.md b/README.md
index 2914bc7..a5c6c4a 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,7 @@ Also, the configuration file is located at ~ / Library / Preferences / io.github
 - OS X El Capitan 10.11.5 (未確認)
 - Mac OS Sierra 10.12 (未確認)
 - macOS Big Sur 11.1 (Apple M1)
+- macOS Monterey 12.4
 
 ## License
 MIT License
@@ -56,6 +57,7 @@ https://ei-kana.appspot.com/
 - OS X El Capitan 10.11.5 (未確認)
 - mac OS Sierra 10.12 (未確認)
 - macOS Big Sur 11.1 (Apple M1)
+- macOS Monterey 12.4
 
 ## ライセンス
 MIT License