diff --git a/CHANGELOG.md b/CHANGELOG.md
index ed6c7c777815b485619281f0de621da65a41b7ef..abe746fc239e4418528624a75d210928d6a3be9c 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 283894f934bebda29c7f96532b50f910a29761a8..7cc040962e7de8b204081bed79d1912d2aed0534 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",