diff --git a/src/types/Types.ts b/src/types/Types.ts
index 51a2030c..9e778fac 100644
--- a/src/types/Types.ts
+++ b/src/types/Types.ts
@@ -3984,7 +3984,7 @@ export interface ListMetaCursor {
 export interface Subscription {
   // Amount in the lowest denomination for the currency (e.g. pence in GBP,
   // cents in EUR).
-  amount?: string;
+  amount?: number;
 
   // The amount to be deducted from each payment as an app fee, to be paid to
   // the partner integration which created the subscription, in the lowest
@@ -4005,7 +4005,7 @@ export interface Subscription {
 
   // As per RFC 2445. The day of the month to charge customers on. `1`-`28` or
   // `-1` to indicate the last day of the month.
-  day_of_month?: string | null;
+  day_of_month?: number | null;
 
   // The earliest date that will be used as a `charge_date` on payments
   // created for this subscription if it is resumed. Only present for `paused`