diff --git a/src/server/object/history.ts b/src/server/object/history.ts
index 12f8d73..20d9eea 100644
--- a/src/server/object/history.ts
+++ b/src/server/object/history.ts
@@ -25,7 +25,7 @@ export class History {
       record.user,
       record.x,
       record.y,
-      record.ts,
+      Math.floor(record.ts / 1000),
       color,
     );
   }