diff --git a/CHANGELOG.md b/CHANGELOG.md
index ed6c7c7778..abe746fc23 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,7 +12,7 @@
 
 -->
 
-## 2023.8.0 (unreleased)
+## 2023.9.0 (unreleased)
 
 ### General
 - OAuth 2.0のサポート
diff --git a/package.json b/package.json
index 283894f934..7cc040962e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "misskey",
-	"version": "13.14.2",
+	"version": "2023.9.0-beta.1",
 	"codename": "nasubi",
 	"repository": {
 		"type": "git",