diff --git a/core/views/common_views.py b/core/views/common_views.py
index 629c967d61e83dd60c97fef7c84a4d254636a946..e3a6d7a0c8ef6dc7dd5676613e1a9a0027ae21f3 100644
--- a/core/views/common_views.py
+++ b/core/views/common_views.py
@@ -31,7 +31,8 @@ from core.serializers import (ExamSerializer, StudentInfoSerializer,
                               SubmissionNoTypeSerializer, StudentSubmissionSerializer,
                               SubmissionTypeSerializer, CorrectorSerializer,
                               UserAccountSerializer, SolutionCommentSerializer,
-                              SubmissionNoTypeWithStudentSerializer)
+                              SubmissionNoTypeWithStudentSerializer,
+                              GroupSerializer)
 
 log = logging.getLogger(__name__)
 config = constance.config