diff --git a/store/serializers.py b/store/serializers.py
index bd32607..9d34ed8 100644
--- a/store/serializers.py
+++ b/store/serializers.py
@@ -145,11 +145,19 @@ class ChecklistSerializer(serializers.ModelSerializer):
 
         self._create_main_images(instance, images.get('main_images'))
         self._create_payment_proofs(instance, images.get('payment_proof'))
+
+        # Perform update
         instance: Checklist = super().update(instance, validated_data)
 
         # Invalidate prefetched images
         delattr(instance, '_images')
 
+        if instance.status == Checklist.Status.NEW:
+            has_payment_info = instance.payment_proof.exists() and instance.payment_method is not None
+            if has_payment_info:
+                instance.status = Checklist.Status.PAYMENT
+                instance.save()
+
         return instance
 
     @staticmethod
diff --git a/store/views.py b/store/views.py
index 6f80322..bdfd1f2 100644
--- a/store/views.py
+++ b/store/views.py
@@ -64,7 +64,11 @@ class LoginAPI(generics.GenericAPIView):
         return Response(UserSerializer(user).data)
 
 
-class ChecklistAPI(mixins.ListModelMixin, mixins.CreateModelMixin, mixins.RetrieveModelMixin, DisablePermissionsMixin):
+class ChecklistAPI(mixins.ListModelMixin,
+                   mixins.CreateModelMixin,
+                   mixins.RetrieveModelMixin,
+                   mixins.UpdateModelMixin,
+                   DisablePermissionsMixin):
     serializer_class = ChecklistSerializer
     lookup_field = 'id'
     filterset_fields = ['status', ]
@@ -115,14 +119,11 @@ class ChecklistAPI(mixins.ListModelMixin, mixins.CreateModelMixin, mixins.Retrie
 
         return self.list(request, *args, **kwargs)
 
-    def patch(self, request, *args, **kwargs):
-        data = json.loads(request.body)
-        instance = get_object_or_404(self.get_queryset(), id=self.kwargs['id'])
-        serializer = self.get_serializer(instance, data=data, partial=True)
-        serializer.is_valid(raise_exception=True)
+    def perform_update(self, serializer):
         serializer.save()
 
-        return Response(serializer.data)
+    def patch(self, request, *args, **kwargs):
+        return self.partial_update(request, *args, **kwargs)
 
 
 class YuanRateAPI(generics.GenericAPIView):