diff --git a/frontend/logbook.ts b/frontend/logbook.ts
index ce698a6..ea4e194 100644
--- a/frontend/logbook.ts
+++ b/frontend/logbook.ts
@@ -5,14 +5,8 @@ export interface Data {
   km: number;
 }
 
-let data = [
-  { date: new Date('2023-01-01'), km: 5 },
-  { date: new Date('2023-02-01'), km: 24 },
-  { date: new Date('2023-08-30'), km: 4000 },
-];
-
 if(sessionStorage.getItem('userStats')) {
-  data = JSON.parse(sessionStorage.getItem('userStats') as Data[]);
+  const data = JSON.parse(sessionStorage.getItem('userStats') || '{}') as Data[];
 
   const margin = { top: 20, right: 20, bottom: 50, left: 50 };
   const width: number = 960 - margin.left - margin.right;