diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 00000000..409d7b27
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,4 @@
+# v1.0.0-beta.1 (2021-04-15)
+
+## ✨ New Features
+- [`6195132`](https://github.com/TomokiMiyauci/fonction/commit/6195132)   Add arithmetic oprations
diff --git a/package.json b/package.json
index cba16a53..4435e6d9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fonction",
-  "version": "0.0.0",
+  "version": "1.0.0-beta.1",
   "main": "dist/index.umd.js",
   "module": "dist/index.es.js",
   "types": "dist/index.es.d.ts",