diff --git a/app/Protocols/Shadowsocks.php b/app/Protocols/Shadowsocks.php
index 6ed9b79..c0a6da6 100644
--- a/app/Protocols/Shadowsocks.php
+++ b/app/Protocols/Shadowsocks.php
@@ -47,7 +47,7 @@ class Shadowsocks extends AbstractProtocol
             "remarks" => $server['name'],
             "server" => $server['host'],
             "server_port" => $server['port'],
-            "password" => $item['password'],
+            "password" => $server['password'],
             "method" => data_get($server, 'protocol_settings.cipher')
         ];
         return $config;
diff --git a/app/Services/OrderService.php b/app/Services/OrderService.php
index dc9fa02..10b1eb9 100644
--- a/app/Services/OrderService.php
+++ b/app/Services/OrderService.php
@@ -37,7 +37,6 @@ class OrderService
      * @param Plan $plan
      * @param string $period
      * @param string|null $couponCode
-     * @param array|null $telegramMessageIds
      * @return Order
      * @throws ApiException
      */
diff --git a/app/Services/Plugin/PluginManager.php b/app/Services/Plugin/PluginManager.php
index 4edd1ff..ac0e6c1 100644
--- a/app/Services/Plugin/PluginManager.php
+++ b/app/Services/Plugin/PluginManager.php
@@ -428,8 +428,22 @@ class PluginManager
 
         $targetPath = $this->pluginPath . '/' . Str::studly($config['code']);
         if (File::exists($targetPath)) {
-            File::deleteDirectory($extractPath);
-            throw new \Exception('插件已存在');
+            $installedConfigPath = $targetPath . '/config.json';
+            if (!File::exists($installedConfigPath)) {
+                throw new \Exception('已安装插件缺少配置文件，无法判断是否可升级');
+            }
+            $installedConfig = json_decode(File::get($installedConfigPath), true);
+
+            $oldVersion = $installedConfig['version'] ?? null;
+            $newVersion = $config['version'] ?? null;
+            if (!$oldVersion || !$newVersion) {
+                throw new \Exception('插件缺少版本号，无法判断是否可升级');
+            }
+            if (version_compare($newVersion, $oldVersion, '<=')) {
+                throw new \Exception('上传插件版本不高于已安装版本，无法升级');
+            }
+
+            File::deleteDirectory($targetPath);
         }
 
         File::copyDirectory($pluginPath, $targetPath);