diff --git a/src/utils/file-size.ts b/src/utils/file-size.ts
index 8f547ce..ab84828 100644
--- a/src/utils/file-size.ts
+++ b/src/utils/file-size.ts
@@ -1,4 +1,3 @@
-/* @ts-ignore */
-export default function fileSizeSI(a?: any, b?: any, c?: any, d?: any, e?: any): string {
+export default function fileSizeSI(a: number, b?: typeof Math, c?: (p: number) => number, d?: number, e?: number): string {
   return ((b = Math), (c = b.log), (d = 1e3), (e = (c(a) / c(d)) | 0), a / b.pow(d, e)).toFixed(2) + ' ' + (e ? 'kMGTPEZY'[--e] + 'B' : 'Bytes');
 }