diff --git a/src/utils.js b/src/utils.js
index fbb808db..19be8f97 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -28,7 +28,7 @@ export function formatTime(ms) {
   ms = ms % HOUR;
   const minute = Math.floor(ms / MINUTE);
   ms = ms % MINUTE;
-  const second = Math.round(ms / SECOND);
+  const second = Math.floor(ms / SECOND);
   if (hour) {
     return `${padZero(hour)}:${padZero(minute)}:${padZero(second)}`;
   }