diff --git a/apps/payment/views.py b/apps/payment/views.py
index 412b5516..d719beb9 100644
--- a/apps/payment/views.py
+++ b/apps/payment/views.py
@@ -6,7 +6,6 @@ from urllib.parse import urlsplit
 
 from django.contrib import messages
 from django.contrib.auth.decorators import login_required
-from django.core.exceptions import DisallowedHost
 from django.http import HttpResponse
 from django.shortcuts import redirect, get_object_or_404
 from django.views.generic import View, TemplateView
@@ -26,6 +25,10 @@ from .models import AuthorBalance, CoursePayment, SchoolPayment
 logger = logging.getLogger('django')
 
 
+class DisallowedPingbackHost(Exception):
+    pass
+
+
 @method_decorator(login_required, name='dispatch')
 class CourseBuySuccessView(TemplateView):
     template_name = 'payment/course_payment_success.html'
@@ -248,5 +251,5 @@ class PaymentwallCallbackView(View):
                 payment.author_balance.save()
             return HttpResponse('OK')
         else:
-            raise DisallowedHost
+            raise DisallowedPingbackHost
             return HttpResponse(status=403)
diff --git a/apps/school/models.py b/apps/school/models.py
index ad9efb2e..f63a2024 100644
--- a/apps/school/models.py
+++ b/apps/school/models.py
@@ -45,7 +45,7 @@ class SchoolSchedule(models.Model):
 
     def is_online(self):
         end_at = datetime.combine(now().today(), self.start_at) + timedelta(hours=2)
-        return self.start_at <= now().time() and end_at.time() >= now().time()
+        return self.start_at <= now().time() and end_at.time() >= now().time() and self.weekday == now().isoweekday()
 
     def current_live_lesson(self):
         now_time = now()