diff --git a/CHANGELOG.md b/CHANGELOG.md
index bb0da37..5c1988e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## [4.2.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/4.2.0...4.2.1) (2023-08-18)
+
+
+### Bug Fixes
+
+* autoScaling and PositionMode may be locked ([3f2f12d](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/3f2f12d2cf7541118c02830ec9fdea8183357487))
+
 # [4.2.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/4.1.7...4.2.0) (2023-08-18)
 
 
diff --git a/package.json b/package.json
index 916d206..4106574 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "com.coffee.ui-particle",
   "displayName": "UI Particle",
   "description": "This plugin provide a component to render particle effect for uGUI.\nThe particle rendering is maskable and sortable, without Camera, RenderTexture or Canvas.",
-  "version": "4.2.0",
+  "version": "4.2.1",
   "unity": "2018.2",
   "license": "MIT",
   "repository": {