diff --git a/apps/qm/serializers.py b/apps/qm/serializers.py
index 0c88d1a2..1868b840 100644
--- a/apps/qm/serializers.py
+++ b/apps/qm/serializers.py
@@ -147,7 +147,7 @@ class FtestworkdefectSerializer(CustomModelSerializer):
 
 
 class FtestWorkCreateUpdateSerializer(CustomModelSerializer):
-    ftestworkdefect = FtestworkdefectSerializer(many=True)
+    ftestworkdefect = FtestworkdefectSerializer(many=True, required=False)
     class Meta:
         model = FtestWork
         fields = ['id', 'shift', 'wm', 'mb',