diff --git a/panoramix/static/widgets/viz_nvd3.css b/panoramix/static/widgets/viz_nvd3.css
new file mode 100644
index 000000000..908d5ad7d
--- /dev/null
+++ b/panoramix/static/widgets/viz_nvd3.css
@@ -0,0 +1,3 @@
+.dashed {
+    stroke-dasharray: 3, 3;
+}