diff --git a/src/s3/formatters.ts b/src/s3/formatters.ts
index 059207c..4f3e9b6 100644
--- a/src/s3/formatters.ts
+++ b/src/s3/formatters.ts
@@ -1,8 +1,9 @@
 import { Readable } from 'stream';
 
-export const streamToString = async (stream: Readable | ReadableStream | Blob) => new Promise((resolve, reject) => {
-  const chunks = []
-  stream.on('data', chunk => chunks.push(chunk))
+export const streamToString = async (stream: Readable) => new Promise((resolve, reject) => {
+  const chunks: any[] = []
+
+  stream.on('data', (chunk: any) => chunks.push(chunk))
   stream.on('error', reject)
   stream.on('end', () => resolve(Buffer.concat(chunks).toString('utf8')))
 })