diff --git a/web_admin/serializers/article_serializer.py b/web_admin/serializers/article_serializer.py
index c338d04..695401e 100644
--- a/web_admin/serializers/article_serializer.py
+++ b/web_admin/serializers/article_serializer.py
@@ -233,7 +233,7 @@ class ArticleListSerializer(serializers.ModelSerializer):
     def get_total_points(self, obj):
         """total points of article"""
         total_question = ArticleSurvey.objects.filter(article=obj).count()
-        return total_question * 5
+        return total_question * NUMBER['five']
 
     def get_is_completed(self, obj):
         """complete all question"""