diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index f3ab3a80..81e5e657 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "4.26.0"
+  ".": "4.27.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 0fdea26b..d2bd16b2 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 118
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-d0eaf664d43e26c42ebf8740ff1b6ee34c4d424c7048a7f04df994cb65627f89.yml
-openapi_spec_hash: 4d7622040380d5c7bd2e5a5ec9b86783
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-2b5eeb4a60cbec92f80b4a54f33c2d17b36cbac4739886f737108f2ad74ff12d.yml
+openapi_spec_hash: ebbe8419f5831506de5b4c0b4eb56acf
 config_hash: 1f73a949b649ecfe6ec68ba1bb459dc2
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 311c1553..920b02ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 4.27.0 (2025-10-15)
+
+Full Changelog: [v4.26.0...v4.27.0](https://github.com/orbcorp/orb-python/compare/v4.26.0...v4.27.0)
+
+### Features
+
+* **api:** api update ([98d744d](https://github.com/orbcorp/orb-python/commit/98d744daa4c10ebeeb447a89402d7209c1331e84))
+
 ## 4.26.0 (2025-10-13)
 
 Full Changelog: [v4.25.0...v4.26.0](https://github.com/orbcorp/orb-python/compare/v4.25.0...v4.26.0)
diff --git a/pyproject.toml b/pyproject.toml
index e84d876a..ed4ab678 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "orb-billing"
-version = "4.26.0"
+version = "4.27.0"
 description = "The official Python library for the orb API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/orb/_version.py b/src/orb/_version.py
index 9c48ab98..000ecd18 100644
--- a/src/orb/_version.py
+++ b/src/orb/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "orb"
-__version__ = "4.26.0"  # x-release-please-version
+__version__ = "4.27.0"  # x-release-please-version
diff --git a/src/orb/types/customers/credits/ledger_create_entry_by_external_id_params.py b/src/orb/types/customers/credits/ledger_create_entry_by_external_id_params.py
index 6db90ed6..302e6456 100644
--- a/src/orb/types/customers/credits/ledger_create_entry_by_external_id_params.py
+++ b/src/orb/types/customers/credits/ledger_create_entry_by_external_id_params.py
@@ -104,6 +104,12 @@ class AddIncrementCreditLedgerEntryRequestParamsInvoiceSettings(TypedDict, total
     credit block's effective date.
     """
 
+    item_id: Optional[str]
+    """The ID of the Item to be used for the invoice line item.
+
+    If not provided, a default 'Credits' item will be used.
+    """
+
     memo: Optional[str]
     """An optional memo to display on the invoice."""
 
diff --git a/src/orb/types/customers/credits/ledger_create_entry_params.py b/src/orb/types/customers/credits/ledger_create_entry_params.py
index a300e05f..a81fd3fc 100644
--- a/src/orb/types/customers/credits/ledger_create_entry_params.py
+++ b/src/orb/types/customers/credits/ledger_create_entry_params.py
@@ -104,6 +104,12 @@ class AddIncrementCreditLedgerEntryRequestParamsInvoiceSettings(TypedDict, total
     credit block's effective date.
     """
 
+    item_id: Optional[str]
+    """The ID of the Item to be used for the invoice line item.
+
+    If not provided, a default 'Credits' item will be used.
+    """
+
     memo: Optional[str]
     """An optional memo to display on the invoice."""
 
diff --git a/tests/api_resources/customers/credits/test_ledger.py b/tests/api_resources/customers/credits/test_ledger.py
index 866dc610..cbab5758 100644
--- a/tests/api_resources/customers/credits/test_ledger.py
+++ b/tests/api_resources/customers/credits/test_ledger.py
@@ -103,6 +103,7 @@ def test_method_create_entry_with_all_params_overload_1(self, client: Orb) -> No
                 "net_terms": 0,
                 "custom_due_date": parse_date("2019-12-27"),
                 "invoice_date": parse_date("2019-12-27"),
+                "item_id": "item_id",
                 "memo": "memo",
                 "require_successful_payment": True,
             },
@@ -418,6 +419,7 @@ def test_method_create_entry_by_external_id_with_all_params_overload_1(self, cli
                 "net_terms": 0,
                 "custom_due_date": parse_date("2019-12-27"),
                 "invoice_date": parse_date("2019-12-27"),
+                "item_id": "item_id",
                 "memo": "memo",
                 "require_successful_payment": True,
             },
@@ -849,6 +851,7 @@ async def test_method_create_entry_with_all_params_overload_1(self, async_client
                 "net_terms": 0,
                 "custom_due_date": parse_date("2019-12-27"),
                 "invoice_date": parse_date("2019-12-27"),
+                "item_id": "item_id",
                 "memo": "memo",
                 "require_successful_payment": True,
             },
@@ -1164,6 +1167,7 @@ async def test_method_create_entry_by_external_id_with_all_params_overload_1(sel
                 "net_terms": 0,
                 "custom_due_date": parse_date("2019-12-27"),
                 "invoice_date": parse_date("2019-12-27"),
+                "item_id": "item_id",
                 "memo": "memo",
                 "require_successful_payment": True,
             },