diff --git a/src/typed-method-types/files.ts b/src/typed-method-types/files.ts
index f805307..4d24248 100644
--- a/src/typed-method-types/files.ts
+++ b/src/typed-method-types/files.ts
@@ -1,26 +1,38 @@
 import { BaseResponse } from "../types.ts";
 
-export type FileUploadV2 = {
-  /** @description Description of image for screen-reader. */
-  alt_text?: string;
-  /** @description Syntax type of the snippet being uploaded. */
-  snippet_type?: string;
-  /** @description The message text introducing the file in specified channels. */
-  channel_id?: string;
+interface FileUpload {
+  /** @description Comma-separated list of channel names or IDs where the file will be shared. */
+  channels?: string;
+  /** @description If omitting this parameter, you must provide a file. */
+  content?: string;
+  /** @description A file type identifier. */
+  filetype?: string;
   /** @description Provide another message's ts value to upload this file as a reply. Never use a reply's ts value; use its parent instead. */
   thread_ts?: string;
   /** @description The message text introducing the file in specified channels. */
   initial_comment?: string;
   /** @description Title of the file being uploaded */
   title?: string;
-
-  /** @description Size in bytes of the file being uploaded. */
-  length: string;
   /** @description Name of the file being uploaded. */
-  filename: string;
+  filename?: string;
   /** @description Filetype of the file being uploaded. */
-  file: Blob | ReadableStream<Uint8Array> | string | ArrayBuffer;
-};
+  file: Exclude<BodyInit, FormData | URLSearchParams>;
+}
+
+// Channels and filetype is no longer a supported field and filename is required for file.uploadV2.
+export type FileUploadV2 =
+  & Omit<FileUpload, "channels" | "filetype" | "content">
+  & {
+    channel_id?: string;
+    /** @description Description of image for screen-reader. */
+    alt_text?: string;
+    /** @description Syntax type of the snippet being uploaded. */
+    snippet_type?: string;
+    /** @description Size in bytes of the file being uploaded. */
+    length: string;
+    /** @description Name of the file being uploaded. */
+    filename: string;
+  };
 
 export type FileUploadV2Args = {
   file_uploads: FileUploadV2[];