diff --git a/release_note_en.md b/release_note_en.md
index b316ede..8714524 100644
--- a/release_note_en.md
+++ b/release_note_en.md
@@ -1,3 +1,9 @@
+v1.0.0
+======
+Oct 06, 2023
+
+- Just changed the version to v1.0.0
+
 v0.15.2
 =======
 Oct 02, 2023
diff --git a/release_note_ja.md b/release_note_ja.md
index 39eb0de..de4c31b 100644
--- a/release_note_ja.md
+++ b/release_note_ja.md
@@ -1,3 +1,9 @@
+v1.0.0
+======
+Oct 10, 2023
+
+- バージョンを v1.0.0 にしました。
+
 v0.15.2
 =======
 Oct 02, 2023