diff --git a/src/types.ts b/src/types.ts
index edaa7f0..f0a80ea 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -84,5 +84,5 @@ export interface ChartProps {
      * A ref to the Chart.js instance
      * @default null
      */
-    ref: Ref<HTMLCanvasElement | null>
+    ref?: Ref<HTMLCanvasElement | null>
 }