diff --git a/deno/payloads/v10/monetization.ts b/deno/payloads/v10/monetization.ts
index 01c66e5d..cb78cfee 100644
--- a/deno/payloads/v10/monetization.ts
+++ b/deno/payloads/v10/monetization.ts
@@ -33,13 +33,13 @@ export interface APIEntitlement {
 	 */
 	deleted: boolean;
 	/**
-	 * Start date at which the entitlement is valid. Not present when using test entitlements.
+	 * Start date at which the entitlement is valid.
 	 */
-	starts_at?: string;
+	starts_at: string | null;
 	/**
-	 * Date at which the entitlement is no longer valid. Not present when using test entitlements.
+	 * Date at which the entitlement is no longer valid.
 	 */
-	ends_at?: string;
+	ends_at: string | null;
 	/**
 	 * For consumable items, whether or not the entitlement has been consumed
 	 */
diff --git a/deno/payloads/v9/monetization.ts b/deno/payloads/v9/monetization.ts
index 01c66e5d..cb78cfee 100644
--- a/deno/payloads/v9/monetization.ts
+++ b/deno/payloads/v9/monetization.ts
@@ -33,13 +33,13 @@ export interface APIEntitlement {
 	 */
 	deleted: boolean;
 	/**
-	 * Start date at which the entitlement is valid. Not present when using test entitlements.
+	 * Start date at which the entitlement is valid.
 	 */
-	starts_at?: string;
+	starts_at: string | null;
 	/**
-	 * Date at which the entitlement is no longer valid. Not present when using test entitlements.
+	 * Date at which the entitlement is no longer valid.
 	 */
-	ends_at?: string;
+	ends_at: string | null;
 	/**
 	 * For consumable items, whether or not the entitlement has been consumed
 	 */
diff --git a/payloads/v10/monetization.ts b/payloads/v10/monetization.ts
index 47d6e4cd..83ec6d10 100644
--- a/payloads/v10/monetization.ts
+++ b/payloads/v10/monetization.ts
@@ -33,13 +33,13 @@ export interface APIEntitlement {
 	 */
 	deleted: boolean;
 	/**
-	 * Start date at which the entitlement is valid. Not present when using test entitlements.
+	 * Start date at which the entitlement is valid.
 	 */
-	starts_at?: string;
+	starts_at: string | null;
 	/**
-	 * Date at which the entitlement is no longer valid. Not present when using test entitlements.
+	 * Date at which the entitlement is no longer valid.
 	 */
-	ends_at?: string;
+	ends_at: string | null;
 	/**
 	 * For consumable items, whether or not the entitlement has been consumed
 	 */
diff --git a/payloads/v9/monetization.ts b/payloads/v9/monetization.ts
index 47d6e4cd..83ec6d10 100644
--- a/payloads/v9/monetization.ts
+++ b/payloads/v9/monetization.ts
@@ -33,13 +33,13 @@ export interface APIEntitlement {
 	 */
 	deleted: boolean;
 	/**
-	 * Start date at which the entitlement is valid. Not present when using test entitlements.
+	 * Start date at which the entitlement is valid.
 	 */
-	starts_at?: string;
+	starts_at: string | null;
 	/**
-	 * Date at which the entitlement is no longer valid. Not present when using test entitlements.
+	 * Date at which the entitlement is no longer valid.
 	 */
-	ends_at?: string;
+	ends_at: string | null;
 	/**
 	 * For consumable items, whether or not the entitlement has been consumed
 	 */