diff --git a/uvdat/core/rest/chart.py b/uvdat/core/rest/chart.py
index a7ec8700..55371d6a 100644
--- a/uvdat/core/rest/chart.py
+++ b/uvdat/core/rest/chart.py
@@ -12,8 +12,7 @@ class ChartViewSet(GenericViewSet, mixins.ListModelMixin):
     serializer_class = ChartSerializer
 
     def get_queryset(self, **kwargs):
-        request = self.request
-        context_id = request.query_params.get('context')
+        context_id = self.request.query_params.get('context')
         if context_id:
             return Chart.objects.filter(context__id=context_id)
         return Chart.objects.all()
diff --git a/uvdat/core/rest/dataset.py b/uvdat/core/rest/dataset.py
index 590639e3..9eaeb6ce 100644
--- a/uvdat/core/rest/dataset.py
+++ b/uvdat/core/rest/dataset.py
@@ -46,21 +46,21 @@ def convert(self, request, **kwargs):
     @action(detail=True, methods=['get'])
     def network(self, request, **kwargs):
         dataset = self.get_object()
-        return HttpResponse(
-            json.dumps(
+        networks = []
+        for network in dataset.networks.all():
+            networks.append([
                 {
                     'nodes': [
                         uvdat_serializers.NetworkNodeSerializer(n).data
-                        for n in NetworkNode.objects.filter(network__dataset=dataset)
+                        for n in NetworkNode.objects.filter(network=network)
                     ],
                     'edges': [
                         uvdat_serializers.NetworkEdgeSerializer(e).data
-                        for e in NetworkEdge.objects.filter(network__dataset=dataset)
+                        for e in NetworkEdge.objects.filter(network=network)
                     ],
                 }
-            ),
-            status=200,
-        )
+            ])
+        return HttpResponse(json.dumps(networks), status=200)
 
     @action(detail=True, methods=['get'])
     def gcc(self, request, **kwargs):
diff --git a/uvdat/core/tasks/chart.py b/uvdat/core/tasks/chart.py
index 536c6292..62a5f511 100644
--- a/uvdat/core/tasks/chart.py
+++ b/uvdat/core/tasks/chart.py
@@ -4,7 +4,7 @@
 import pandas
 from webcolors import name_to_hex
 
-from uvdat.core.models import Chart, Context
+from uvdat.core.models import Chart, Context, NetworkNode
 
 
 @shared_task
@@ -45,9 +45,6 @@ def convert_chart(chart_id, conversion_options):
 
 def get_gcc_chart(dataset, context_id):
     chart_name = f'{dataset.name} Greatest Connected Component Sizes'
-    max_nodes = 0
-    for network in dataset.networks.all():
-        max_nodes += network.nodes.count()
     try:
         return Chart.objects.get(name=chart_name)
     except Chart.DoesNotExist:
@@ -66,7 +63,7 @@ def get_gcc_chart(dataset, context_id):
                 'chart_title': 'Size of Greatest Connected Component over Period',
                 'x_title': 'Step when Excluded Nodes Changed',
                 'y_title': 'Number of Nodes',
-                'y_range': [0, max_nodes],
+                'y_range': [0, NetworkNode.objects.filter(network__dataset=dataset).count()],
             },
         )
         print('\t', f'Chart {chart.name} created.')
diff --git a/uvdat/core/tests/test_load_roads.py b/uvdat/core/tests/test_load_roads.py
index 572de76e..2fbaa6b4 100644
--- a/uvdat/core/tests/test_load_roads.py
+++ b/uvdat/core/tests/test_load_roads.py
@@ -7,7 +7,6 @@
 
 @pytest.mark.django_db
 def test_load_roads():
-
     context = Context.objects.create(
         name='Road Test', default_map_zoom=10, default_map_center=Point(42, -71)
     )