diff --git a/components/Coze.js b/components/Coze.js
index d4472d29..cfed4a9f 100644
--- a/components/Coze.js
+++ b/components/Coze.js
@@ -16,7 +16,7 @@ export default function Coze() {
 
   const loadCoze = async () => {
     await loadExternalResource(cozeSrc)
-    CozeWebSDK = window.CozeWebSDK
+    const CozeWebSDK = window?.CozeWebSDK
     if (CozeWebSDK) {
       new CozeWebSDK.WebChatClient({
         config: {