diff --git a/release_note_en.md b/release_note_en.md
index 388fbd7..2c95216 100644
--- a/release_note_en.md
+++ b/release_note_en.md
@@ -1,3 +1,7 @@
+v0.4.0
+======
+Dec.8, 2024
+
 - Rename system variables (**Breaking changes**)
     - `$MATCH` → `MATCH`
 - Update gmnlisp to v0.7.4
diff --git a/release_note_ja.md b/release_note_ja.md
index 49f8ebb..3fdb24b 100644
--- a/release_note_ja.md
+++ b/release_note_ja.md
@@ -1,3 +1,7 @@
+v0.4.0
+======
+Dec.8, 2024
+
 - システム変数名を変更 (**Breaking changes**)
     - `$MATCH` → `MATCH`
 - gmnlisp を v0.7.4 相当へ