diff --git a/deno-runtime/handlers/slashcommand-handler.ts b/deno-runtime/handlers/slashcommand-handler.ts
index 5422e1e58..5415094e3 100644
--- a/deno-runtime/handlers/slashcommand-handler.ts
+++ b/deno-runtime/handlers/slashcommand-handler.ts
@@ -2,8 +2,8 @@ import { Defined, JsonRpcError } from 'jsonrpc-lite';
 
 import type { IRoom } from '@rocket.chat/apps-engine/definition/rooms/IRoom.ts';
 import type { ISlashCommand } from '@rocket.chat/apps-engine/definition/slashcommands/ISlashCommand.ts';
-import { SlashCommandContext as _SlashCommandContext } from '@rocket.chat/apps-engine/definition/slashcommands/SlashCommandContext.ts';
-import { Room as _Room } from '@rocket.chat/apps-engine/server/rooms/Room.ts';
+import type { SlashCommandContext as _SlashCommandContext } from '@rocket.chat/apps-engine/definition/slashcommands/SlashCommandContext.ts';
+import type { Room as _Room } from '@rocket.chat/apps-engine/server/rooms/Room.ts';
 
 import { AppObjectRegistry } from '../AppObjectRegistry.ts';
 import { AppAccessors, AppAccessorsInstance } from '../lib/accessors/mod.ts';
diff --git a/deno-runtime/lib/messenger.ts b/deno-runtime/lib/messenger.ts
index 8ce558da3..c701cce5e 100644
--- a/deno-runtime/lib/messenger.ts
+++ b/deno-runtime/lib/messenger.ts
@@ -125,10 +125,8 @@ export async function successResponse({ id, result }: SuccessResponseDescriptor)
 export async function sendRequest(requestDescriptor: RequestDescriptor): Promise<jsonrpc.SuccessObject> {
     const request = jsonrpc.request(Math.random().toString(36).slice(2), requestDescriptor.method, requestDescriptor.params);
 
-    await Transport.send(request);
-
     // TODO: add timeout to this
-    return new Promise((resolve, reject) => {
+    const responsePromise = new Promise((resolve, reject) => {
         const handler = (event: Event) => {
             if (event instanceof ErrorEvent) {
                 reject(event.error);
@@ -143,6 +141,10 @@ export async function sendRequest(requestDescriptor: RequestDescriptor): Promise
 
         RPCResponseObserver.addEventListener(`response:${request.id}`, handler);
     });
+
+    await Transport.send(request);
+
+    return responsePromise as Promise<jsonrpc.SuccessObject>;
 }
 
 export function sendNotification({ method, params }: NotificationDescriptor) {