diff --git a/frontend/src/views/setting/system/config/components/authConfig.vue b/frontend/src/views/setting/system/config/components/authConfig.vue
index 69d319b25e..a55e704b73 100644
--- a/frontend/src/views/setting/system/config/components/authConfig.vue
+++ b/frontend/src/views/setting/system/config/components/authConfig.vue
@@ -484,7 +484,7 @@
           >
             <a-input-password
               v-model:model-value="activeAuthForm.configuration.password"
-              :max-length="255"
+              :max-length="64"
               :placeholder="t('system.config.auth.LDAPPasswordPlaceholder')"
               allow-clear
               autocomplete="new-password"