diff --git a/application/extra/captcha.php b/application/extra/captcha.php
index 69d50495..8e45f3c9 100644
--- a/application/extra/captcha.php
+++ b/application/extra/captcha.php
@@ -14,5 +14,5 @@ return [
     'length'      =>    3,   
     // 关闭验证码杂点
     'useNoise'    =>    false,
-    'useZh'       =>    true
+    'useZh'       =>    false
 ];
\ No newline at end of file