diff --git a/types/chance/index.d.ts b/types/chance/index.d.ts
index 07418e45be..05d388b97a 100644
--- a/types/chance/index.d.ts
+++ b/types/chance/index.d.ts
@@ -189,6 +189,8 @@ declare namespace Chance {
         year?: number;
         month?: number;
         day?: number;
+        min?: Date;
+        max?: Date;
     }
 
     interface Month {