diff --git a/app/controllers/api/v1/resident_experts_controller.rb b/app/controllers/api/v1/resident_experts_controller.rb
index 373344760..b45dddd83 100644
--- a/app/controllers/api/v1/resident_experts_controller.rb
+++ b/app/controllers/api/v1/resident_experts_controller.rb
@@ -2,8 +2,9 @@ class Api::V1::ResidentExpertsController < Api::V1::BaseController
   before_action :require_login, except: [:index]
 
   def index
+    @resident_experts = ResidentExpert.approved.includes(:user)
     all_resident_experts = ResidentExpert.approved.includes(:user)
-    @resident_experts = all_resident_experts.where(expert_category: params[:expert_category]) if params[:expert_category].present?
+    @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)