diff --git a/packages/client/src/components/chart-tooltip.vue b/packages/client/src/components/chart-tooltip.vue
index 5c5e42db8..9b57a1b3d 100644
--- a/packages/client/src/components/chart-tooltip.vue
+++ b/packages/client/src/components/chart-tooltip.vue
@@ -20,8 +20,8 @@ const props = defineProps<{
 	showing: boolean;
 	x: number;
 	y: number;
-	title: string;
-	series: {
+	title?: string;
+	series?: {
 		backgroundColor: string;
 		borderColor: string;
 		text: string;