diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..acebc4c
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,5 @@
+# v2.0.0 / 2021-06-20
+
+## :boom: Breaking Changes
+
+- [#58](https://github.com/yyc1217/twzipcode-data/issues/58): Data structure *CHANGED* permanently.
\ No newline at end of file
diff --git a/README.md b/README.md
index c84593e..a4843aa 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,8 @@
 [![npm](https://img.shields.io/npm/dt/twzipcode-data.svg)](https://www.npmjs.com/package/twzipcode-data)
 [![npm](https://img.shields.io/npm/v/twzipcode-data.svg)](https://www.npmjs.com/package/twzipcode-data)
 [![npm](https://img.shields.io/npm/l/twzipcode-data.svg)](https://github.com/yyc1217/twzipcode-data)
+[![dependencies](https://david-dm.org/yyc1217/twzipcode-data.svg)](https://david-dm.org/yyc1217/twzipcode-data)
+[![devDependency](https://david-dm.org/yyc1217/twzipcode-data/dev-status.svg)](https://david-dm.org/yyc1217/twzipcode-data#info=devDependencies)
 [![GitHub stars](https://img.shields.io/github/stars/yyc1217/twzipcode-data.svg?style=social&label=Star)](https://github.com/yyc1217/twzipcode-data)
 
 ## Install