diff --git a/progress/views.py b/progress/views.py
index 40aef45..dd8ab83 100644
--- a/progress/views.py
+++ b/progress/views.py
@@ -35,7 +35,7 @@ class StudentWorkView(APIView):
                     server_status,
                     checker__out_key=teacher_token,
                     id__gt=last_id,
-                )[last_id:50]
+                )[last_id:100]
                 return Response([ProgressLessonSerializer(i).data for i in progress_lessons], status=200)
             except ValidationError:
                 return Response("Bad request", status=400)
diff --git a/requirements.txt b/requirements.txt
index 80ea9e5..696753c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,6 +15,7 @@ psycopg2==2.7.3.1
 raven==6.2.1
 requests==2.18.4
 Unidecode==0.4.21
+PyJWT==1.5.3
 
 # amqp==2.2.2
 # Babel==2.5.1