diff --git a/server/apps/quality/serializers.py b/server/apps/quality/serializers.py
index 1901e66..c586fed 100644
--- a/server/apps/quality/serializers.py
+++ b/server/apps/quality/serializers.py
@@ -24,9 +24,9 @@ class InspectTaskSerializer(serializers.ModelSerializer):
         model = InspectTask
         fields = '__all__'
     
-    def get_dept_count(obj):
+    def get_dept_count(self, obj):
         return InspectDept.objects.filter(subtask__inspecttask=obj, is_deleted=True).count()
 
-    def get_subtask_count(obj):
+    def get_subtask_count(self, obj):
         return SubInspectTask.objects.filter(inspecttask=obj, is_deleted=True).count()