diff --git a/CHANGELOG-PRERELEASE.md b/CHANGELOG-PRERELEASE.md
index 2f89e65c8..68045eb13 100644
--- a/CHANGELOG-PRERELEASE.md
+++ b/CHANGELOG-PRERELEASE.md
@@ -16,11 +16,14 @@ The format is based on [Keep a Changelog].
 ### Removed
 
 ### Fixed
-- Index out of bounds error with remove mesh by mask `#1119`
-- NRE with Generic Avatar `#1122`
 
 ### Security
 
+## [1.7.8-beta.1] - 2024-07-21
+### Fixed
+- Index out of bounds error with remove mesh by mask [`#1119`](https://github.com/anatawa12/AvatarOptimizer/pull/1119)
+- NRE with Generic Avatar [`#1122`](https://github.com/anatawa12/AvatarOptimizer/pull/1122)
+
 ## [1.7.7] - 2024-07-08
 ## [1.7.7-beta.1] - 2024-07-08
 ### Added
@@ -1462,7 +1465,8 @@ This release is mistake.
 - Merge Bone
 - Clear Endpoint Position
 
-[Unreleased]: https://github.com/anatawa12/AvatarOptimizer/compare/v1.7.7...HEAD
+[Unreleased]: https://github.com/anatawa12/AvatarOptimizer/compare/v1.7.8-beta.1...HEAD
+[1.7.8-beta.1]: https://github.com/anatawa12/AvatarOptimizer/compare/v1.7.7...v1.7.8-beta.1
 [1.7.7]: https://github.com/anatawa12/AvatarOptimizer/compare/v1.7.7-beta.1...v1.7.7
 [1.7.7-beta.1]: https://github.com/anatawa12/AvatarOptimizer/compare/v1.7.6...v1.7.7-beta.1
 [1.7.6]: https://github.com/anatawa12/AvatarOptimizer/compare/v1.7.6-beta.2...v1.7.6
diff --git a/package.json b/package.json
index a156d713b..3247f0aea 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "com.anatawa12.avatar-optimizer",
-  "version": "1.7.8-beta.0",
+  "version": "1.7.8-beta.1",
   "private": false,
   "private-beta": false,
   "unity": "2019.4",