diff --git a/CHANGELOG.md b/CHANGELOG.md
index d4dc761..7645933 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [0.4.0](https://github.com/mob-sakai/SoftMaskForUGUI/tree/0.4.0) (2019-01-13)
+
+[Full Changelog](https://github.com/mob-sakai/SoftMaskForUGUI/compare/v0.3.0...0.4.0)
+
+**Implemented enhancements:**
+
+- Integrate with UnityPackageManager [\#22](https://github.com/mob-sakai/SoftMaskForUGUI/issues/22)
+
+**Fixed bugs:**
+
+- Flipped soft mask texture [\#25](https://github.com/mob-sakai/SoftMaskForUGUI/issues/25)
+
 ## [v0.3.0](https://github.com/mob-sakai/SoftMaskForUGUI/tree/v0.3.0) (2019-01-07)
 
 [Full Changelog](https://github.com/mob-sakai/SoftMaskForUGUI/compare/v0.2.0...v0.3.0)
diff --git a/package.json b/package.json
index 0c41231..545400d 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
 	"name": "com.coffee.softmask-for-ugui",
 	"displayName": "Soft Mask For uGUI",
 	"description": "SoftMask is a smooth masking component for uGUI elements in Unity.\nBy using SoftMask instead of default Mask, rounded edges of UI elements can be expressed beautifully.",
-	"version": "0.3.0",
+	"version": "0.4.0",
 	"unity": "2017.1",
 	"license": "MIT",
 	"repository": {
@@ -13,4 +13,4 @@
 	"author": "mob-sakai <sakai861104@gmail.com> (https://github.com/mob-sakai)",
 	"dependencies": {
 	}
-}
\ No newline at end of file
+}