diff --git a/packages/types/src/notification.ts b/packages/types/src/notification.ts
index 427bac36d4..5bfd1c2062 100644
--- a/packages/types/src/notification.ts
+++ b/packages/types/src/notification.ts
@@ -9,6 +9,6 @@ export interface Notification {
 
 export interface NotificationContext {
   card: CardID
-  lastViewTimestamp: number
-  lastUpdateTimestamp: number
+  lastView: Date
+  lastUpdate: Date
 }