diff --git a/docs/en/update/images/DeleteENI.png b/docs/en/update/images/DeleteENI.png
new file mode 100644
index 00000000..e6dba80a
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diff --git a/docs/en/update/update.md b/docs/en/update/update.md
index 9d687567..cef8fbac 100644
--- a/docs/en/update/update.md
+++ b/docs/en/update/update.md
@@ -26,9 +26,13 @@ Use the following steps to update this solution on AWS.
 ![Input Url](images/InputUrl.jpg)
 3. On the **specified stack details** page, click **Next**.  
 4. On the **Configure stack options** page, click **Next**.
-5. On the **Review** page, review and confirm the settings. Select 3 checkboxes that I acknowledge.Choose **Create stack** to deploy the stack.   
-Wait for about 10 minutes to ensure that all related resource are updated. You can choose the **Resource** and **Event** tab to see the status of the stack.
+5. On the **Review** page, review and confirm the settings. Select 3 checkboxes that I acknowledge.Choose **Create stack** to deploy the stack.
+6. When upgrading from 1.1.0 to subsequent versions, please manually delete 4 ENIs with a status of **Available** after 5 minutes of CloudFormat update: 2 descriptions contain **PortalConfigFunction** and 2 descriptions contain **PortalFunction**。
+![Delete ENI](images/DeleteENI.png)
+7. Wait for about 20 minutes to ensure that all related resource are updated. You can choose the **Resource** and **Event** tab to see the status of the stack.
 After the update is successful, you can reopen the administrator page.
+!!! Important "Important"
+    You need to manually delete ENI, otherwise the upgrade will fail.
 
 ### Step 2. Update the agent stack
 
diff --git a/docs/zh/update/images/DeleteENI.png b/docs/zh/update/images/DeleteENI.png
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diff --git a/docs/zh/update/update.md b/docs/zh/update/update.md
index c8028bb1..df873a9e 100644
--- a/docs/zh/update/update.md
+++ b/docs/zh/update/update.md
@@ -26,9 +26,13 @@
 ![Input Url](images/InputUrl.jpg)
 3. 在**指定堆栈详细信息**页面上，各个参数保持不变，然后点击**下一步**。  
 4. 在**配置堆栈选项**页面上，各个参数保持不变，然后点击**下一步**。  
-5. 在**审核**页面上，查看并确认设置。选中3个“我确认”的复选框，点击**提交**按钮以更新堆栈。  
-等待约10分钟，以确保成功更新了所有相关资源。您可以选择“资源”和“事件”选项卡查看堆栈的状态。  
+5. 在**审核**页面上，查看并确认设置。选中3个“我确认”的复选框，点击**提交**按钮以更新堆栈。
+6. 从1.1.0升级到后续版本时，请在CloudFormation更新5分钟后，手动删除4个状态为**Available**的ENI：2个描述内容包含**PortalConfigFunction**，2个描述内容包含**PortalFunction**。
+![Delete ENI](images/DeleteENI.png)
+7. 等待约20分钟，以确保成功更新了所有相关资源。您可以选择“资源”和“事件”选项卡查看堆栈的状态。  
 更新成功后，即可重新打开管理员页面。
+!!! Important "重要提示"
+    需要手动删除ENI，否则升级会失败。
 
 ### 步骤二：升级Agent堆栈