diff --git a/packages/web-api/src/methods.ts b/packages/web-api/src/methods.ts
index 0626f1b2a..5c7a62c26 100644
--- a/packages/web-api/src/methods.ts
+++ b/packages/web-api/src/methods.ts
@@ -365,17 +365,14 @@ export interface FilesCommentsDeleteArguments extends WebAPICallOptions, TokenOv
 }
 // either file or external_id is required
 export interface FilesRemoteInfoArguments extends WebAPICallOptions, TokenOverridable {
-  channel?: string;
-
   // either one of the file or external_id arguments are required
-  file: string;
-  external_id: string;
+  file?: string;
+  external_id?: string;
 }
 export interface FilesRemoteListArguments extends WebAPICallOptions, TokenOverridable, CursorPaginationEnabled {
   ts_from?: string;
   ts_to?: string;
   channel?: string;
-  types?: string;
 }
 cursorPaginationEnabledMethods.add('files.remote.list');
 export interface FilesRemoteAddArguments extends WebAPICallOptions, TokenOverridable {
@@ -384,32 +381,30 @@ export interface FilesRemoteAddArguments extends WebAPICallOptions, TokenOverrid
   external_id: string; // a unique identifier for the file in your system
   filetype: string; // possible values (except for 'auto'): https://api.slack.com/types/file#file_types
   preview_image?: Buffer | Stream;
-  preview_file?: Buffer | Stream;
   indexable_file_contents?: Buffer | Stream;
 }
 export interface FilesRemoteUpdateArguments extends WebAPICallOptions, TokenOverridable {
-  title: string;
-  external_url: string;
-  filetype: string; // possible values (except for 'auto'): https://api.slack.com/types/file#file_types
+  title?: string;
+  external_url?: string;
+  filetype?: string; // possible values (except for 'auto'): https://api.slack.com/types/file#file_types
   preview_image?: Buffer | Stream;
-  preview_file?: Buffer | Stream;
   indexable_file_contents?: Buffer | Stream;
 
   // either one of the file or external_id arguments are required
-  file: string;
-  external_id: string;
+  file?: string;
+  external_id?: string;
 }
 export interface FilesRemoteRemoveArguments extends WebAPICallOptions, TokenOverridable {
   // either one of the file or external_id arguments are required
-  file: string;
-  external_id: string;
+  file?: string;
+  external_id?: string;
 }
 export interface FilesRemoteShareArguments extends WebAPICallOptions, TokenOverridable {
   channels: string; // comma-separated list of channel ids
 
   // either one of the file or external_id arguments are required
-  file: string;
-  external_id: string;
+  file?: string;
+  external_id?: string;
 }
 
   /*