diff --git a/combo/apps/dataviz/views.py b/combo/apps/dataviz/views.py
index a9955a01..cf319e08 100644
--- a/combo/apps/dataviz/views.py
+++ b/combo/apps/dataviz/views.py
@@ -41,8 +41,8 @@ def dataviz_graph(request, *args, **kwargs):
     error_text = None
     try:
         chart = cell.get_chart(
-                width=int(request.GET.get('width', 0)) or None,
-                height=int(request.GET.get('height', 0)) or int(cell.height)
+                width=int(request.GET['width']) if request.GET.get('width') else None,
+                height=int(request.GET['height']) if request.GET.get('height') else int(cell.height)
         )
     except UnsupportedDataSet as e:
         error_text = _('Unsupported dataset.')
diff --git a/tests/test_dataviz.py b/tests/test_dataviz.py
index 6fc01251..3854569b 100644
--- a/tests/test_dataviz.py
+++ b/tests/test_dataviz.py
@@ -380,6 +380,9 @@ def test_chartng_cell_view(app, normal_user):
             resp = app.get('/api/dataviz/graph/1/?width=400')
             assert resp.content_type == 'image/svg+xml'
 
+            resp = app.get('/api/dataviz/graph/1/?width=')  # no crash
+            assert resp.content_type == 'image/svg+xml'
+
             page.public = False
             page.save()
             resp = app.get('/api/dataviz/graph/1/?width=400', status=403)