diff --git a/screen_sequence_diagrams/add_class.dot b/screen_sequence_diagrams/add_class.dot
index 62cad8e..3f25f2b 100644
--- a/screen_sequence_diagrams/add_class.dot
+++ b/screen_sequence_diagrams/add_class.dot
@@ -1,7 +1,7 @@
 digraph G{
 	ratio=0.75;
 	//rankdir="LR";
-	node[shape = box, style = rounded];
+	node[shape=box, style="rounded,filled,bold"];
 	splines=ortho;
 	nodesep=1.4;
 	"Sidebar Menu"[center=true, fillcolor="#aaaaff", style=filled,pos="0,0!"];