diff --git a/types/index.esm.d.ts b/types/index.esm.d.ts
index 7a571d3..e568e3f 100644
--- a/types/index.esm.d.ts
+++ b/types/index.esm.d.ts
@@ -70,6 +70,7 @@ declare module 'chart.js' {
       datasetOptions: SankeyControllerDatasetOptions;
       defaultDataPoint: SankeyDataPoint;
       parsedDataType: SankeyParsedData;
+      metaExtensions:{}
       /* TODO: define sankey chart options */
       chartOptions: any;
       scales: keyof CartesianScaleTypeRegistry;