diff --git a/README.md b/README.md
index 0faad283..ad57361e 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ For Next.js, see https://github.com/kitsuyui/nextjs-playground/ .
       https://www.npmjs.com/package/@kitsuyui/react-clock
 - [x] `@kitsuyui/react-timer` ... [![npm version](https://badge.fury.io/js/@kitsuyui%2Freact-timer.svg)](https://badge.fury.io/js/@kitsuyui%2Freact-timer)
       https://www.npmjs.com/package/@kitsuyui/react-timer
-- [ ] Stopwatch
+- [x] `@kitsuyui/react-stopwatch` ... [![npm version](https://badge.fury.io/js/@kitsuyui%2Freact-stopwatch.svg)](https://badge.fury.io/js/@kitsuyui%2Freact-stopwatch)
 - [ ] Alarm
 - [ ] Dice
 
diff --git a/packages/stopwatch/README.md b/packages/stopwatch/README.md
index 53cc335f..5b4a6992 100644
--- a/packages/stopwatch/README.md
+++ b/packages/stopwatch/README.md
@@ -2,6 +2,8 @@
 
 [![npm version](https://badge.fury.io/js/@kitsuyui%2Freact-stopwatch.svg)](https://badge.fury.io/js/@kitsuyui%2Freact-stopwatch)
 
+<img width="204" alt="Stopwatch" src="https://github.com/kitsuyui/react-playground/assets/2596972/b25cc228-24ce-45eb-850a-c3775b708d3d">
+
 ## Installation
 
 ### npm