diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 807cc3ab..803fec4a 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "4.41.0"
+  ".": "4.42.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 3cb33be6..9e11ba24 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-4ad3b44ca7f484243d8706b6aa7f4498fc5bf2b37fadf3da0a06d657e482c08f.yml
-openapi_spec_hash: 9ead1a2aae36be1086c627c3636064ea
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-e639b12e0daebce74f42d1f31f675bda4287b9c749dd7d4620a1e96a83343ec4.yml
+openapi_spec_hash: 51eb3d47b25e299de670b2d52f5e9017
 config_hash: e6db17547fe854b1c240407cf4c6dc9e
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ddd014f6..ecede4dc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 4.42.0 (2025-11-18)
+
+Full Changelog: [v4.41.0...v4.42.0](https://github.com/orbcorp/orb-python/compare/v4.41.0...v4.42.0)
+
+### Features
+
+* **api:** api update ([cce6674](https://github.com/orbcorp/orb-python/commit/cce6674f8565785add4c6dee0103e3a32d8583ea))
+
 ## 4.41.0 (2025-11-16)
 
 Full Changelog: [v4.40.0...v4.41.0](https://github.com/orbcorp/orb-python/compare/v4.40.0...v4.41.0)
diff --git a/pyproject.toml b/pyproject.toml
index 5ee2c43c..845fb11e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "orb-billing"
-version = "4.41.0"
+version = "4.42.0"
 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 afb8c3b9..497a54dd 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__ = "4.41.0"  # x-release-please-version
+__version__ = "4.42.0"  # x-release-please-version
diff --git a/src/orb/types/plan.py b/src/orb/types/plan.py
index 4dee4e7a..25eb312d 100644
--- a/src/orb/types/plan.py
+++ b/src/orb/types/plan.py
@@ -96,11 +96,15 @@ class Plan(BaseModel):
     """
 
     base_plan: Optional[BasePlan] = None
+    """
+    Legacy field representing the parent plan if the current plan is a 'child plan',
+    overriding prices from the parent.
+    """
 
     base_plan_id: Optional[str] = None
     """
-    The parent plan id if the given plan was created by overriding one or more of
-    the parent's prices
+    Legacy field representing the parent plan ID if the current plan is a 'child
+    plan', overriding prices from the parent.
     """
 
     created_at: datetime
diff --git a/src/orb/types/subscription_price_intervals_params.py b/src/orb/types/subscription_price_intervals_params.py
index a59e68da..f2575595 100644
--- a/src/orb/types/subscription_price_intervals_params.py
+++ b/src/orb/types/subscription_price_intervals_params.py
@@ -776,8 +776,8 @@ class Edit(TypedDict, total=False):
     can_defer_billing: Optional[bool]
     """
     If true, ending an in-arrears price interval mid-cycle will defer billing the
-    final line itemuntil the next scheduled invoice. If false, it will be billed on
-    its end date. If not provided, behaviorwill follow account default.
+    final line item until the next scheduled invoice. If false, it will be billed on
+    its end date. If not provided, behavior will follow account default.
     """
 
     end_date: Annotated[Union[Union[str, datetime], BillingCycleRelativeDate, None], PropertyInfo(format="iso8601")]