diff --git a/lib/Constants.ts b/lib/Constants.ts
index a84c61d6..d398d739 100644
--- a/lib/Constants.ts
+++ b/lib/Constants.ts
@@ -45,6 +45,8 @@ export const ImageFormats = [
 ] as const;
 export type ImageFormat = typeof ImageFormats[number];
 
+export type FilterFileTypes = "image" | "video" | "audio" | `.${string}`;
+
 export enum WebhookTypes {
     /** Incoming webhooks can post messages to channels with a generated token */
     INCOMING         = 1,
diff --git a/lib/types/applications.d.ts b/lib/types/applications.d.ts
index f16d162a..89470bd7 100644
--- a/lib/types/applications.d.ts
+++ b/lib/types/applications.d.ts
@@ -36,7 +36,8 @@ import type {
     TeamPayoutAccountStatus,
     TeamPayoutGateway,
     TeamMemberRoleType,
-    ApplicationType
+    ApplicationType,
+    FilterFileTypes
 } from "../Constants";
 import type ApplicationCommand from "../structures/ApplicationCommand";
 import type ClientApplication from "../structures/ClientApplication";
@@ -283,7 +284,7 @@ export interface RawApplicationCommandOption {
     description: string;
     description_localizations?: LocaleMap | null;
     description_localized?: string;
-    file_types?: Array<string>;
+    file_types?: Array<FilterFileTypes>;
     max_length?: number;
     max_value?: number;
     min_length?: number;
@@ -303,7 +304,7 @@ export interface CombinedApplicationCommandOption {
     description: string;
     descriptionLocalizations?: LocaleMap | null;
     descriptionLocalized?: string;
-    fileTypes?: Array<string>;
+    fileTypes?: Array<FilterFileTypes>;
     maxLength?: number;
     maxValue?: number;
     minLength?: number;
@@ -394,10 +395,11 @@ interface ApplicationCommandOptionsSubCommandGroup extends ApplicationCommandOpt
     options?: Array<ApplicationCommandOptionsSubCommand | ApplicationCommandOptionsWithValue>;
 }
 
-export interface ApplicationCommandOptionsAttachment extends ApplicationCommandOptionBase<ApplicationCommandOptionTypes.ATTACHMENT> {
-    fileTypes?: Array<string>;
+interface ApplicationCommandOptionsFileTypeFilter {
+    fileTypes?: Array<FilterFileTypes>;
 }
 
+export interface ApplicationCommandOptionsAttachment extends ApplicationCommandOptionBase<ApplicationCommandOptionTypes.ATTACHMENT>, ApplicationCommandOptionsFileTypeFilter {}
 export interface ApplicationCommandOptionsBoolean extends ApplicationCommandOptionBase<ApplicationCommandOptionTypes.BOOLEAN> {}
 export interface ApplicationCommandOptionsChannel extends ApplicationCommandOptionBase<ApplicationCommandOptionTypes.CHANNEL>, ApplicationCommandOptionsChannelTypes {}
 export type ApplicationCommandOptionsInteger = ApplicationCommandOptionBase<ApplicationCommandOptionTypes.INTEGER> & Types.Shared.ExclusifyUnion<ApplicationCommandOptionsAutocomplete | ApplicationCommandOptionsMinMaxValue | ApplicationCommandOptionsChoices<ApplicationCommandOptionTypes.INTEGER>>;
diff --git a/lib/types/channels.d.ts b/lib/types/channels.d.ts
index 56cc5b0d..64ab98d8 100644
--- a/lib/types/channels.d.ts
+++ b/lib/types/channels.d.ts
@@ -36,7 +36,8 @@ import type {
     SeparatorSpacingSize,
     GuildInviteChannelTypes,
     DMInviteChannelTypes,
-    MessageReferenceType
+    MessageReferenceType,
+    FilterFileTypes
 } from "../Constants";
 import type Member from "../structures/Member";
 import type AnnouncementChannel from "../structures/AnnouncementChannel";
@@ -1648,7 +1649,7 @@ export interface RawModalLabel extends Omit<BaseComponent, "id"> {
 
 export interface ModalFileUploadComponent extends BaseComponent {
     customID: string;
-    fileTypes?: Array<string>;
+    fileTypes?: Array<FilterFileTypes>;
     maxValues?: number;
     minValues?: number;
     required?: boolean;
@@ -1657,7 +1658,7 @@ export interface ModalFileUploadComponent extends BaseComponent {
 
 export interface RawModalFileUploadComponent extends BaseComponent {
     custom_id: string;
-    file_types?: Array<string>;
+    file_types?: Array<FilterFileTypes>;
     max_values?: number;
     min_values?: number;
     required?: boolean;