diff --git a/app/controllers/api/v1/resident_experts_controller.rb b/app/controllers/api/v1/resident_experts_controller.rb
index c387f7d73..1c0297e0f 100644
--- a/app/controllers/api/v1/resident_experts_controller.rb
+++ b/app/controllers/api/v1/resident_experts_controller.rb
@@ -8,7 +8,7 @@ class Api::V1::ResidentExpertsController < Api::V1::BaseController
     @resident_experts = @resident_experts.where(expert_category: params[:expert_category]) if params[:expert_category].present?
     @resident_experts = @resident_experts.where("name like ? or department like ?", "%#{params[:keyword]}%", "%#{params[:keyword]}%") if params[:keyword].present?
     @resident_expert_category_list = all_resident_experts.group(:expert_category).count
-    @resident_expert_memos_rank_list = all_resident_experts.order("users.memos_count desc").limit(5)
+    @resident_expert_memos_rank_list = all_resident_experts.joins(:user).joins("LEFT JOIN memos ON memos.author_id = users.id AND memos.hidden = false").group("resident_experts.id").order("COUNT(memos.id) DESC").limit(5)
     @resident_experts = @resident_experts.order(created_at: :desc)
     @resident_experts = kaminari_paginate(@resident_experts)
   end