diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 25c8ce570..34d617f19 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -212,8 +212,10 @@ class UsersController < ApplicationController
   def update
     return render_not_found unless @user = User.find_by(login: params[:id]) || User.find_by_id(params[:id]) 
     return render_forbidden unless User.current.logged? && (current_user&.admin? || current_user.id == @user.id)
-    keywords = user_params[:nickname].to_s.each_char.select { |c| c.bytes.first < 240 }.join('')
-    return normal_status(-1, "昵称中包含关键词：#{keywords}，请重新命名") if ReversedKeyword.check_exists?(keywords)
+    if user_params[:nickname].present?
+      keywords = user_params[:nickname].to_s.each_char.select { |c| c.bytes.first < 240 }.join('')
+      return normal_status(-1, "昵称中包含关键词：#{keywords}，请重新命名") if ReversedKeyword.check_exists?(keywords)
+    end
     Util.write_file(@image, avatar_path(@user)) if user_params[:image].present?
     @user.attributes = user_params.except(:image)
     unless @user.save