diff --git a/oj/urls.py b/oj/urls.py
index e2fd51c7..b0ca69f5 100644
--- a/oj/urls.py
+++ b/oj/urls.py
@@ -14,7 +14,7 @@ from group.views import (GroupAdminAPIView, GroupMemberAdminAPIView,
 from admin.views import AdminTemplateView
 
 from problem.views import TestCaseUploadAPIView, ProblemTagAdminAPIView, ProblemAdminAPIView
-from submission.views import SubmissionnAPIView
+from submission.views import SubmissionAPIView
 
 urlpatterns = [
     url(r'^install/$', "install.views.install"),
@@ -56,6 +56,6 @@ urlpatterns = [
 
     url(r'^api/admin/join_group_request/$', JoinGroupRequestAdminAPIView.as_view(),
         name="join_group_request_admin_api"),
-    url(r'^api/submission/$', SubmissionnAPIView.as_view(), name="submission_api"),
+    url(r'^api/submission/$', SubmissionAPIView.as_view(), name="submission_api"),
 
 ]
diff --git a/submission/views.py b/submission/views.py
index 0a923e07..07fe70fc 100644
--- a/submission/views.py
+++ b/submission/views.py
@@ -18,12 +18,12 @@ from .serializers import  CreateSubmissionSerializer
 
 
 def _create_mondodb_connection():
-        mongodb_setting = settings["mongodb_setting"]
-        connection = pymongo.MongoClient(host=mongodb_setting["HOST"], port=mongodb_setting["PORT"])
-        return connection["oj"]["oj_submission"]
+    mongodb_setting = settings.MONGODB
+    connection = pymongo.MongoClient(host=mongodb_setting["HOST"], port=mongodb_setting["PORT"])
+    return connection["oj"]["oj_submission"]
 
 
-class SubmissionnAPIView(APIView):
+class SubmissionAPIView(APIView):
     @login_required
     def post(self, request):
         """