diff --git a/types/plotly.js/index.d.ts b/types/plotly.js/index.d.ts
index 662b441012..30f0515116 100644
--- a/types/plotly.js/index.d.ts
+++ b/types/plotly.js/index.d.ts
@@ -546,6 +546,7 @@ export interface PlotData {
 	fillcolor: string;
 	legendgroup: string;
 	name: string;
+	stackgroup: string;
 	connectgaps: boolean;
 	visible: boolean | 'legendonly';
 	transforms: DataTransform[];