diff --git a/app/wechat/service/FansService.php b/app/wechat/service/FansService.php
index 841e0674c..c92beeafa 100644
--- a/app/wechat/service/FansService.php
+++ b/app/wechat/service/FansService.php
@@ -34,7 +34,7 @@ class FansService extends Service
      * @throws \think\db\exception\DbException
      * @throws \think\db\exception\ModelNotFoundException
      */
-    public function set(array $user, $appid = '')
+    public function set(array $user, string $appid = '')
     {
         if (!empty($user['subscribe_time'])) {
             $user['subscribe_at'] = date('Y-m-d H:i:s', $user['subscribe_time']);
@@ -55,7 +55,7 @@ class FansService extends Service
      * @throws \think\db\exception\DbException
      * @throws \think\db\exception\ModelNotFoundException
      */
-    public function get($openid)
+    public function get(string $openid)
     {
         return $this->app->db->name('WechatFans')->where(['openid' => $openid])->find();
     }
diff --git a/app/wechat/service/MediaService.php b/app/wechat/service/MediaService.php
index ba0ee3f7c..632adac9b 100644
--- a/app/wechat/service/MediaService.php
+++ b/app/wechat/service/MediaService.php
@@ -61,7 +61,7 @@ class MediaService extends Service
      * @throws \think\db\exception\DbException
      * @throws \think\db\exception\ModelNotFoundException
      */
-    public function upload($url, $type = 'image', $video = [])
+    public function upload(string $url, string $type = 'image', array $video = [])
     {
         $map = ['md5' => md5($url), 'appid' => WechatService::instance()->getAppid()];
         if (($mediaId = $this->app->db->name('WechatMedia')->where($map)->value('media_id'))) return $mediaId;
@@ -79,7 +79,7 @@ class MediaService extends Service
      * @return string
      * @throws \WeChat\Exceptions\LocalCacheException
      */
-    private function _buildCurlFile($local)
+    private function _buildCurlFile(string $local)
     {
         if (file_exists($local)) {
             return new MyCurlFile($local);
diff --git a/app/wechat/service/WechatService.php b/app/wechat/service/WechatService.php
index f7810d82b..68f7ac93f 100644
--- a/app/wechat/service/WechatService.php
+++ b/app/wechat/service/WechatService.php
@@ -95,7 +95,7 @@ class WechatService extends Service
      * @throws \think\db\exception\DbException
      * @throws \think\db\exception\ModelNotFoundException
      */
-    public static function __callStatic($name, $arguments)
+    public static function __callStatic(string $name, array $arguments)
     {
         [$type, $class, $classname] = self::paraseName($name);
         if ("{$type}{$class}" !== $name) {
@@ -132,7 +132,7 @@ class WechatService extends Service
      * @param string $name
      * @return array
      */
-    private static function paraseName($name)
+    private static function paraseName(string $name)
     {
         foreach (['WeChat', 'WeMini', 'WeOpen', 'WePay', 'ThinkService'] as $type) {
             if (strpos($name, $type) === 0) {
@@ -220,7 +220,7 @@ class WechatService extends Service
      * @throws \think\db\exception\DbException
      * @throws \think\db\exception\ModelNotFoundException
      */
-    public function getWebOauthInfo($source, $isfull = 0, $redirect = true)
+    public function getWebOauthInfo(string $source, $isfull = 0, $redirect = true)
     {
         $appid = $this->getAppid();
         $openid = $this->app->session->get("{$appid}_openid");
@@ -265,7 +265,7 @@ class WechatService extends Service
 
     /**
      * 获取微信网页JSSDK
-     * @param string $location JS签名地址
+     * @param null|string $location 签名地址
      * @return array
      * @throws \WeChat\Exceptions\InvalidResponseException
      * @throws \WeChat\Exceptions\LocalCacheException
@@ -274,7 +274,7 @@ class WechatService extends Service
      * @throws \think\db\exception\DbException
      * @throws \think\db\exception\ModelNotFoundException
      */
-    public function getWebJssdkSign($location = null)
+    public function getWebJssdkSign(?string $location = null)
     {
         $location = is_null($location) ? $this->app->request->url(true) : $location;
         if ($this->getType() === 'api') {