diff --git a/cmd/modgraphviz/main.go b/cmd/modgraphviz/main.go
index 016ea22..a0351dc 100644
--- a/cmd/modgraphviz/main.go
+++ b/cmd/modgraphviz/main.go
@@ -71,6 +71,7 @@
 	}
 
 	fmt.Fprintf(out, "digraph gomodgraph {\n")
+	fmt.Fprintf(out, "\tnode [ shape=rectangle fontsize=12 ]\n")
 	out.Write(graph.edgesAsDOT())
 	for _, n := range graph.mvsPicked {
 		fmt.Fprintf(out, "\t%q [style = filled, fillcolor = green]\n", n)
@@ -152,7 +153,6 @@
 
 	// Make this function deterministic.
 	sort.Strings(g.mvsPicked)
-
 	return &g, nil
 }
 
diff --git a/cmd/modgraphviz/main_test.go b/cmd/modgraphviz/main_test.go
index 01b0cac..bec88cf 100644
--- a/cmd/modgraphviz/main_test.go
+++ b/cmd/modgraphviz/main_test.go
@@ -23,6 +23,7 @@
 
 	gotGraph := string(out.Bytes())
 	wantGraph := `digraph gomodgraph {
+	node [ shape=rectangle fontsize=12 ]
 	"test.com/A@v1.0.0" -> "test.com/B@v1.2.3"
 	"test.com/B@v1.0.0" -> "test.com/C@v4.5.6"
 	"test.com/A@v1.0.0" [style = filled, fillcolor = green]