diff --git a/release_note_en.md b/release_note_en.md
index c76778e..584bc54 100644
--- a/release_note_en.md
+++ b/release_note_en.md
@@ -1,3 +1,5 @@
+- Refactor: renamed the structure type managing Pseudoconsole session, goroutine communication channels, and other related information from `Global` to `Env`.
+
 v0.5.0
 ======
 May 3, 2025
diff --git a/release_note_ja.md b/release_note_ja.md
index d4118a4..96d765f 100644
--- a/release_note_ja.md
+++ b/release_note_ja.md
@@ -1,3 +1,5 @@
+- 疑似端末情報やゴルーチン通信用チャンネルなどの情報を管理する構造体名を `Global` から `Env` に改めた。
+
 v0.5.0
 ======
 May 3, 2025