diff --git a/src/stores/navbar.ts b/src/stores/navbar.ts
index 243ab3e6..fa2a0906 100644
--- a/src/stores/navbar.ts
+++ b/src/stores/navbar.ts
@@ -4,8 +4,8 @@ import { ref } from 'vue'
 export const useNavbarStore = defineStore(
   'navbar',
   () => {
-    const downloadData = ref<number[]>(new Array(15).fill(0))
-    const uploadData = ref<number[]>(new Array(15).fill(0))
+    const downloadData = ref<(number | null)[]>(new Array(15).fill(null))
+    const uploadData = ref<(number | null)[]>(new Array(15).fill(null))
 
     function pushDownloadData(data: number) {
       downloadData.value.shift()