diff --git a/02. PARA/03. Resources（資源）/Trojan.md b/02. PARA/03. Resources（資源）/Trojan.md
index 2bcc467..d131c29 100644
--- a/02. PARA/03. Resources（資源）/Trojan.md	
+++ b/02. PARA/03. Resources（資源）/Trojan.md	
@@ -21,4 +21,12 @@
 1. [Trojan 上網架設(替代VPN)爬梯子 科學上網 利器 - TWIDC](https://lab.twidc.net/trojan-%E4%B8%8A%E7%B6%B2%E6%9E%B6%E7%BD%AE%E6%9B%BF%E4%BB%A3vpn/)
 2. [Trojan搭建私人VPN - Lingme](https://lingmin.me/2020/03/03/TrojanVPS/)
 3. [[转载+修改]使用Trojan-Go科学上网 - 996 RIP](https://typecho.996.rip/index.php/archives/20/)
-4. Source code: [Releases · trojan-gfw/trojan](https://github.com/trojan-gfw/trojan/releases)
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+4. Source code: [Releases · trojan-gfw/trojan](https://github.com/trojan-gfw/trojan/releases)
+
+## 更新憑證
+1. 先停止 trojan-web
+    ```bash
+    systemctl stop trojan-web
+    ```
+2. 停止 trojan，如下圖
+    ![[Pasted image 20220815134750.png|500]]
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