diff --git a/.release-please-manifest-beta.json b/.release-please-manifest-beta.json
index 204e7a5c..5227eb4e 100644
--- a/.release-please-manifest-beta.json
+++ b/.release-please-manifest-beta.json
@@ -1,3 +1,3 @@
 {
-  ".": "3.15.3-beta.0"
+  ".": "3.16.0-beta.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c9a1ea2..bfba6105 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,14 @@ All notable changes to PicPeak will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [3.16.0-beta.0](https://github.com/the-luap/picpeak/compare/v3.15.3-beta.0...v3.16.0-beta.0) (2026-03-05)
+
+
+### Features
+
+* add thumbnail settings UI to admin panel ([3a30fea](https://github.com/the-luap/picpeak/commit/3a30fea862034d64fbc7188fc25292594a9319e2))
+* add thumbnail settings UI to admin settings page ([#206](https://github.com/the-luap/picpeak/issues/206)) ([7d6d2f5](https://github.com/the-luap/picpeak/commit/7d6d2f56883a4402f0d97c95b0432a8a783c8024))
+
 ## [3.15.3-beta.0](https://github.com/the-luap/picpeak/compare/v3.15.2-beta.0...v3.15.3-beta.0) (2026-03-02)
 
 
diff --git a/backend/package.json b/backend/package.json
index 1f99340b..279a7436 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "picpeak-backend",
-  "version": "3.15.3-beta.0",
+  "version": "3.16.0-beta.0",
   "description": "Backend for PicPeak event photo sharing platform",
   "main": "server.js",
   "scripts": {
diff --git a/frontend/package.json b/frontend/package.json
index f8c50f1e..c3fdda84 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,7 +1,7 @@
 {
   "name": "picpeak-frontend",
   "private": true,
-  "version": "3.15.3-beta.0",
+  "version": "3.16.0-beta.0",
   "type": "module",
   "scripts": {
     "dev": "vite",