diff --git a/types/src/front/api_handlers/public/assistant.ts b/types/src/front/api_handlers/public/assistant.ts
index 208fb7121689..bfc9043d817b 100644
--- a/types/src/front/api_handlers/public/assistant.ts
+++ b/types/src/front/api_handlers/public/assistant.ts
@@ -27,6 +27,7 @@ export const PublicPostMessagesRequestBodySchema = t.intersection([
         t.literal("gsheet"),
         t.literal("zapier"),
         t.literal("make"),
+        t.literal("zendesk"),
         t.null,
         t.undefined,
       ]),
diff --git a/types/src/front/assistant/conversation.ts b/types/src/front/assistant/conversation.ts
index ef7dc728aa62..70dc53a76e51 100644
--- a/types/src/front/assistant/conversation.ts
+++ b/types/src/front/assistant/conversation.ts
@@ -59,7 +59,8 @@ export type UserMessageOrigin =
   | "api"
   | "gsheet"
   | "zapier"
-  | "make";
+  | "make"
+  | "zendesk";
 
 export type UserMessageContext = {
   username: string;