diff --git a/application/common/validate/Users.php b/application/common/validate/Users.php
index ec9a02a8..0c47ae8a 100644
--- a/application/common/validate/Users.php
+++ b/application/common/validate/Users.php
@@ -13,7 +13,7 @@ use think\Validate;
 class Users extends Validate
 {
     protected $rule = [
-        'username'          => 'require|max:15|unique:users',
+        'username'          => 'require|min:3|max:15|alphaDash|unique:users',
         'nickname'          => 'max:15',
         'default_folder'    => 'max:30|chsAlphaNum',
         'email'             => 'require|email|max:50|unique:users',
@@ -52,4 +52,4 @@ class Users extends Validate
     {
         return $this->only(['username', 'email', 'password']);
     }
-}
\ No newline at end of file
+}