diff --git a/types/chart.js/index.d.ts b/types/chart.js/index.d.ts
index 2c5de28962..621152162a 100644
--- a/types/chart.js/index.d.ts
+++ b/types/chart.js/index.d.ts
@@ -166,7 +166,7 @@ declare namespace Chart {
 
     interface ChartPoint {
         x?: number | string | Date;
-        y?: number;
+        y?: number | string | Date;
         r?: number;
     }