diff --git a/postal-mime.d.ts b/postal-mime.d.ts
index bf8dc08b669a7f78cb33f719d45435a6940e8996..953d9f81d670430bb20ef467193f34bb37eafc97 100644
--- a/postal-mime.d.ts
+++ b/postal-mime.d.ts
@@ -1,4 +1,4 @@
-export type RawEmail = string | ArrayBuffer | Uint8Array | Blob | Buffer | ReadableStream;
+export type RawEmail = string | ArrayBuffer | Uint8Array | Blob | ReadableStream;
 
 export type Header = Record<string, string>;