diff --git a/src/count-down/index.js b/src/count-down/index.tsx
similarity index 99%
rename from src/count-down/index.js
rename to src/count-down/index.tsx
index f005a5333..0deed0b3b 100644
--- a/src/count-down/index.js
+++ b/src/count-down/index.tsx
@@ -45,6 +45,7 @@ export default createComponent({
 
     const resetTime = () => {
       reset(+props.time);
+
       if (props.autoStart) {
         start();
       }