diff --git a/src/channels/whatsapp/adapter.test.ts b/src/channels/whatsapp/adapter.test.ts
index a9efa0f..72cada4 100644
--- a/src/channels/whatsapp/adapter.test.ts
+++ b/src/channels/whatsapp/adapter.test.ts
@@ -32,13 +32,19 @@ function createMockClient() {
 
 let mockClient = createMockClient();
 
-vi.mock('whatsapp-web.js', () => ({
-  Client: vi.fn().mockImplementation(() => mockClient),
-  LocalAuth: vi.fn().mockImplementation((opts: Record<string, unknown>) => ({
+vi.mock('whatsapp-web.js', () => {
+  const Client = vi.fn().mockImplementation(() => mockClient);
+  const LocalAuth = vi.fn().mockImplementation((opts: Record<string, unknown>) => ({
     type: 'local',
     ...opts,
-  })),
-}));
+  }));
+  return {
+    default: { Client, LocalAuth, MessageMedia: vi.fn() },
+    Client,
+    LocalAuth,
+    MessageMedia: vi.fn(),
+  };
+});
 
 import { WhatsAppAdapter, type WhatsAppAdapterConfig } from './adapter.js';
 import type { InboundMessage } from '../types.js';
diff --git a/src/channels/whatsapp/adapter.ts b/src/channels/whatsapp/adapter.ts
index 06007e0..37b2f0e 100644
--- a/src/channels/whatsapp/adapter.ts
+++ b/src/channels/whatsapp/adapter.ts
@@ -7,7 +7,8 @@
  * Messages are chunked at 4096 chars (same as Telegram).
  */
 
-import { Client, LocalAuth, MessageMedia } from 'whatsapp-web.js';
+import WhatsApp from 'whatsapp-web.js';
+const { Client, LocalAuth, MessageMedia } = WhatsApp;
 import type {
   Attachment,
   InboundMessage,
@@ -57,7 +58,7 @@ export class WhatsAppAdapter implements ChannelAdapter {
   readonly name = 'whatsapp';
 
   private _status: ChannelStatus = 'disconnected';
-  private client: Client | null = null;
+  private client: InstanceType<typeof Client> | null = null;
   private messageHandler?: (msg: InboundMessage) => void;
   private config: WhatsAppAdapterConfig;
   private botId?: string;