diff --git a/CHANGELOG.md b/CHANGELOG.md
index 872748e..b57f9fe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## [v1.2.1](https://github.com/mob-sakai/ParticleEffectForUGUI/tree/v1.2.1) (2018-12-13)
+
+[Full Changelog](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v1.2.0...v1.2.1)
+
+**Fixed bugs:**
+
+- Rect mask 2D doesn't work on WebGL [\#20](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/20)
+
 ## [v1.2.0](https://github.com/mob-sakai/ParticleEffectForUGUI/tree/v1.2.0) (2018-12-13)
 
 [Full Changelog](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v1.1.0...v1.2.0)
diff --git a/package.json b/package.json
index 07e3bd1..f2f303f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ParticleEffectForUGUI",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/mob-sakai/ParticleEffectForUGUI.git"