diff --git a/class/local_avatars.php b/class/local_avatars.php
index 3f1bd9d..b5419df 100644
--- a/class/local_avatars.php
+++ b/class/local_avatars.php
@@ -66,7 +66,7 @@ checked($options['gdk_local_avatars_caps'], 1); ?>/>仅具有头像上传权限
         return $new_input;
     }
 
-    public function get_avatar($avatar, $id_or_email, $size = 96, $default, $alt)
+    public function get_avatar($avatar, $id_or_email, $size, $default, $alt)
     {
         if (is_numeric($id_or_email)) {
             $user_id = (int) $id_or_email;
diff --git a/class/points/class-points-admin.php b/class/points/class-points-admin.php
index 7510f84..2564452 100644
--- a/class/points/class-points-admin.php
+++ b/class/points/class-points-admin.php
@@ -184,7 +184,7 @@ class GDK_Points_Admin
     public static function admin_notices()
     {
         if (!empty(self::$notices)) {
-            foreach (self::$notices as $notice) {
+            foreach ((array) self::$notices as $notice) {
                 echo $notice;
             }
         }
@@ -225,7 +225,7 @@ class GDK_Points_Admin
                 $k[] = '<div style="margin-bottom:10px;">用户ID：'.$sdata.'  &nbsp;&nbsp;&nbsp;||&nbsp;&nbsp;&nbsp;总金币为：'.GDK_Points::get_user_total_points($sdata).'</div>';
             }
             if (is_array($points)) {
-                foreach ($points as $point) {
+                foreach ((array) $points as $point) {
                     $userid = $point->user_id;
                     $user_name = get_user_by('id', $userid)->display_name;
                     $k[] = '<div style="margin-bottom:5px;">用户ID：'.$userid.'&nbsp;&nbsp;&nbsp;||&nbsp;&nbsp;&nbsp;金币：'.$point->points.' &nbsp;&nbsp;&nbsp;||&nbsp;&nbsp;&nbsp;描述：'.$point->description.' &nbsp;&nbsp;&nbsp;||&nbsp;&nbsp;&nbsp;日期：'.$point->datetime.'&nbsp;&nbsp;&nbsp;||&nbsp;&nbsp;&nbsp;用户名：'.$user_name.'</div>';
@@ -457,7 +457,7 @@ class GDK_Points_Admin
         $output .= '<span class="title">状态</span>';
         $output .= ' ';
         $output .= '<select name="status">';
-        foreach ($status_descriptions as $key => $label) {
+        foreach ((array) $status_descriptions as $key => $label) {
             $selected = $key == $status ? ' selected="selected" ' : '';
             $output .= '<option '.$selected.' value="'.esc_attr($key).'">'.$label.'</option>';
         }
diff --git a/class/updates.php b/class/updates.php
index 5bbd0f1..6bae80b 100644
--- a/class/updates.php
+++ b/class/updates.php
@@ -88,7 +88,7 @@ if (!class_exists('ThemeUpdateChecker')) {
                 return $theme->get('Version');
             }
 
-            foreach (get_themes() as $theme) {
+            foreach ((array) get_themes() as $theme) {
                 if ($theme['Stylesheet'] === $this->theme) {
                     return $theme['Version'];
                 }
@@ -180,7 +180,7 @@ if (!class_exists('ThemeUpdate')) {
             }
 
             $update = new self();
-            foreach (get_object_vars($apiResponse) as $key => $value) {
+            foreach ((array) get_object_vars($apiResponse) as $key => $value) {
                 $update->{$key} = $value;
             }