diff --git a/src/types/interactions/application_command_option_types.ts b/src/types/interactions/application_command_option_types.ts
index a3a45451c..da0f2ed76 100644
--- a/src/types/interactions/application_command_option_types.ts
+++ b/src/types/interactions/application_command_option_types.ts
@@ -8,6 +8,7 @@ export enum DiscordApplicationCommandOptionTypes {
   USER,
   CHANNEL,
   ROLE,
+  MENTIONABLE,
 }
 
 export type ApplicationCommandOptionTypes =