diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3dee1096cc..dea18d0086 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,69 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+## [4.0.0](https://github.com/kufu/smarthr-ui/compare/v3.9.2...v4.0.0) (2019-08-05)
+
+
+### Tests
+
+* add a test for missing exports in src/index.ts ([55618db](https://github.com/kufu/smarthr-ui/commit/55618db))
+
+
+* BREAKING CHANGE: Update palette of theme (#220) ([de50fd8](https://github.com/kufu/smarthr-ui/commit/de50fd8)), closes [#220](https://github.com/kufu/smarthr-ui/issues/220)
+
+
+### BREAKING CHANGES
+
+* new theme does not support outdated variables
+
+* chore: replace ${palette.White} to #fff
+
+* chore: replace Mono_P10 to Border
+
+* chore: replace Mono_P20 to Border
+
+* chore: replace SmarthrGreen to Main
+
+* chore: theme.palette.White to #fff
+
+* chore: replace Mono_P40 to TextGrey
+
+* chore: replace palette.Red to palette.Danger
+
+* chore: replace Mono_P60 to TextGrey
+
+* chore: replace Orange_M30 to Warning
+
+* chore: replace Yellow to Warning
+
+* chore: replace Red to Danger
+
+* chore: replace Blue to Main
+
+* chore: replace White to #fff
+
+* chore: replace Black to TextBlack
+
+* chore: replace Mono_P30 to TextGrey
+
+* chore: change color
+
+* chore: yarn add polished
+
+* feat: add hoverColor method
+
+* chore: modify hover color for PagenationItem
+
+* chore: modify hover color for Button
+
+* chore: modify focus color for Input
+
+* style: change color code to lower case
+
+* style: update snapshots
+
+
+
 ### [3.9.2](https://github.com/kufu/smarthr-ui/compare/v3.9.1...v3.9.2) (2019-07-31)
 
 
diff --git a/package.json b/package.json
index fdabd5bb5d..d6cfde72a3 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "smarthr-ui",
   "description": "SmartHR ui components built with React.",
-  "version": "3.9.2",
+  "version": "4.0.0",
   "author": "SmartHR-UI Team",
   "dependencies": {
     "lodash.merge": "^4.6.1",