diff --git a/SAS/TMSS/src/tmss/tmssapp/conversions.py b/SAS/TMSS/src/tmss/tmssapp/conversions.py
index ce112f7b30b8f697baf91d4da9202899703715ba..22555cead455b5184655cb37130feee0c1d444ef 100644
--- a/SAS/TMSS/src/tmss/tmssapp/conversions.py
+++ b/SAS/TMSS/src/tmss/tmssapp/conversions.py
@@ -1,6 +1,5 @@
 from astropy.time import Time
 import astropy.units
-from lofar.lta.sip import station_coordinates
 from datetime import datetime
 from astropy.coordinates.earth import EarthLocation
 from astropy.coordinates import Angle
@@ -13,7 +12,7 @@ def create_astroplan_observer_for_station(station: str) -> Observer:
     :param station: a station name, e.g. "CS002"
     :return: astroplan.observer.Observer object
     '''
-
+    from lofar.lta.sip import station_coordinates
     coords = station_coordinates.parse_station_coordinates()["%s_LBA" % station.upper()]
     location = EarthLocation.from_geocentric(x=coords['x'], y=coords['y'], z=coords['z'],  unit=astropy.units.m)
     observer = Observer(location, name="LOFAR", timezone="UTC")
diff --git a/SAS/TMSS/src/tmss/tmssapp/viewsets/scheduling.py b/SAS/TMSS/src/tmss/tmssapp/viewsets/scheduling.py
index a4b8efc16e262703604531826107d21a093ed558..8ad75743cc38917a2fac4714a2744f4d3a58f4a5 100644
--- a/SAS/TMSS/src/tmss/tmssapp/viewsets/scheduling.py
+++ b/SAS/TMSS/src/tmss/tmssapp/viewsets/scheduling.py
@@ -36,7 +36,7 @@ from rest_framework.views import APIView
 from rest_framework.decorators import api_view, renderer_classes
 
 from lofar.sas.tmss.tmss.tmssapp.adapters.sip import generate_sip_for_dataproduct
-from lofar.lta.sip import visualizer
+
 
 class TextPlainAutoSchema(SwaggerAutoSchema):
     def get_produces(self):
@@ -330,6 +330,7 @@ class DataproductViewSet(LOFARViewSet):
     @action(methods=['get'], detail=True, url_name="sip_graph")
     def sip_graph(self, request, pk=None):
         dataproduct = get_object_or_404(models.Dataproduct, pk=pk)
+        from lofar.lta.sip import visualizer
         return HttpResponse(visualizer.visualize_sip(generate_sip_for_dataproduct(dataproduct)), content_type='image/svg+xml')