diff --git a/digital_doctor_admin/application/config.php b/digital_doctor_admin/application/config.php
index fc07960..9a1e313 100644
--- a/digital_doctor_admin/application/config.php
+++ b/digital_doctor_admin/application/config.php
@@ -267,7 +267,7 @@ return [
     //验证码配置
     'captcha'                => [
         // 验证码字符集合
-        'codeSet'  => '2345678abcdefhijkmnpqrstuvwxyzABCDEFGHJKLMNPQRTUVWXY',
+        'codeSet'  => '23456789',
         // 验证码字体大小(px)
         'fontSize' => 18,
         // 是否画混淆曲线