diff --git a/package-lock.json b/package-lock.json
deleted file mode 100644
index 111491ae..00000000
--- a/package-lock.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "name": "Yuxi-Know",
-  "lockfileVersion": 3,
-  "requires": true,
-  "packages": {}
-}
diff --git a/src/models/chat_model.py b/src/models/chat_model.py
index 600cfe06..18a9e95f 100644
--- a/src/models/chat_model.py
+++ b/src/models/chat_model.py
@@ -28,7 +28,8 @@ class OpenAIBase():
             stream=True,
         )
         for chunk in response:
-            yield chunk.choices[0].delta
+            if len(chunk.choices) > 0:
+                yield chunk.choices[0].delta
 
     def _get_response(self, messages):
         response = self.client.chat.completions.create(
diff --git a/web/src/components/ChatComponent.vue b/web/src/components/ChatComponent.vue
index d59257c7..a6482479 100644
--- a/web/src/components/ChatComponent.vue
+++ b/web/src/components/ChatComponent.vue
@@ -183,7 +183,7 @@
                 type="link"
               >
                 <template #icon>
-                  <StopOutlined v-if="isStreaming" />
+                  <PauseOutlined v-if="isStreaming" />
                   <ArrowUpOutlined v-else />
                 </template>
               </a-button>
@@ -220,7 +220,7 @@ import {
   BulbOutlined,
   CaretRightOutlined,
   DeploymentUnitOutlined,
-  StopOutlined,
+  PauseOutlined,
   ReloadOutlined,
   CopyOutlined
 } from '@ant-design/icons-vue'