diff --git a/Packages/src/CHANGELOG.md b/Packages/src/CHANGELOG.md
index 1b38110..ded6ea5 100644
--- a/Packages/src/CHANGELOG.md
+++ b/Packages/src/CHANGELOG.md
@@ -1,3 +1,10 @@
+# [5.0.0-preview.21](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/5.0.0-preview.20...5.0.0-preview.21) (2026-07-04)
+
+
+### Bug Fixes
+
+* fix mesh copying ([da49a93](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/da49a931e3c43f8988e29700c44cbff802bef641))
+
 # [5.0.0-preview.20](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/5.0.0-preview.19...5.0.0-preview.20) (2026-06-29)
 
 
diff --git a/Packages/src/package.json b/Packages/src/package.json
index 5f2377c..7149815 100644
--- a/Packages/src/package.json
+++ b/Packages/src/package.json
@@ -2,7 +2,7 @@
   "name": "com.coffee.ui-particle",
   "displayName": "UI Particle",
   "description": "This package provides a component to render particle effects for uGUI.\nThe particle rendering is maskable and sortable, without the need for an extra Camera, RenderTexture, or Canvas.",
-  "version": "5.0.0-preview.20",
+  "version": "5.0.0-preview.21",
   "unity": "2019.3",
   "license": "MIT",
   "repository": {