diff --git a/projects/common/src/player/player.ts b/projects/common/src/player/player.ts
index 3eee493..38076d3 100644
--- a/projects/common/src/player/player.ts
+++ b/projects/common/src/player/player.ts
@@ -57,5 +57,5 @@ export default class Player {
 }
 
 export type StatisticChange = {
-  [key in Timeframe]: PlayerHistory;
+  [key in Timeframe]?: PlayerHistory;
 };