diff --git a/.stats.yml b/.stats.yml
index 7d050298..bca80a58 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,2 +1,2 @@
 configured_endpoints: 97
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-14d1c1e4560c65c7c62f23343268ece4476ae079cd01ba2e6b924efde5f97c3e.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-e9785c0b77f4a91dd668d12d707abdaa63cc527029c9d62a92ac24ec40500d18.yml
diff --git a/src/orb/types/customers/credits/ledger_create_entry_by_external_id_response.py b/src/orb/types/customers/credits/ledger_create_entry_by_external_id_response.py
index 82acb578..903d95f3 100644
--- a/src/orb/types/customers/credits/ledger_create_entry_by_external_id_response.py
+++ b/src/orb/types/customers/credits/ledger_create_entry_by_external_id_response.py
@@ -180,7 +180,7 @@ class ExpirationChangeLedgerEntry(BaseModel):
     cleared by setting `metadata` to `null`.
     """
 
-    new_block_expiry_date: datetime
+    new_block_expiry_date: Optional[datetime] = None
 
     starting_balance: float
 
diff --git a/src/orb/types/customers/credits/ledger_create_entry_response.py b/src/orb/types/customers/credits/ledger_create_entry_response.py
index 17dc5228..f21c2562 100644
--- a/src/orb/types/customers/credits/ledger_create_entry_response.py
+++ b/src/orb/types/customers/credits/ledger_create_entry_response.py
@@ -180,7 +180,7 @@ class ExpirationChangeLedgerEntry(BaseModel):
     cleared by setting `metadata` to `null`.
     """
 
-    new_block_expiry_date: datetime
+    new_block_expiry_date: Optional[datetime] = None
 
     starting_balance: float
 
diff --git a/src/orb/types/customers/credits/ledger_list_by_external_id_response.py b/src/orb/types/customers/credits/ledger_list_by_external_id_response.py
index fd5d03a2..e7b515fd 100644
--- a/src/orb/types/customers/credits/ledger_list_by_external_id_response.py
+++ b/src/orb/types/customers/credits/ledger_list_by_external_id_response.py
@@ -180,7 +180,7 @@ class ExpirationChangeLedgerEntry(BaseModel):
     cleared by setting `metadata` to `null`.
     """
 
-    new_block_expiry_date: datetime
+    new_block_expiry_date: Optional[datetime] = None
 
     starting_balance: float
 
diff --git a/src/orb/types/customers/credits/ledger_list_response.py b/src/orb/types/customers/credits/ledger_list_response.py
index c02858de..26008bcc 100644
--- a/src/orb/types/customers/credits/ledger_list_response.py
+++ b/src/orb/types/customers/credits/ledger_list_response.py
@@ -180,7 +180,7 @@ class ExpirationChangeLedgerEntry(BaseModel):
     cleared by setting `metadata` to `null`.
     """
 
-    new_block_expiry_date: datetime
+    new_block_expiry_date: Optional[datetime] = None
 
     starting_balance: float