diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2ff85815..71a7a376 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,13 +1,12 @@
 name: CI
 on:
   push:
-    branches-ignore:
-      - 'generated'
-      - 'codegen/**'
-      - 'integrated/**'
-      - 'preview-head/**'
-      - 'preview-base/**'
-      - 'preview/**'
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+      - next
 
 jobs:
   lint:
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index f2863752..9436ab48 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.90.0"
+  ".": "0.90.1"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0b86f92e..7eb87ff5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## 0.90.1 (2025-04-11)
+
+Full Changelog: [v0.90.0...v0.90.1](https://github.com/lithic-com/lithic-python/compare/v0.90.0...v0.90.1)
+
+### Bug Fixes
+
+* **perf:** skip traversing types for NotGiven values ([5c6a919](https://github.com/lithic-com/lithic-python/commit/5c6a9196fab4c1cfcfdc64689088570df57c2245))
+
+
+### Chores
+
+* **internal:** reduce CI branch coverage ([cf29bc0](https://github.com/lithic-com/lithic-python/commit/cf29bc098038e00d1a332b156cc1b192e0b1cad1))
+
 ## 0.90.0 (2025-04-09)
 
 Full Changelog: [v0.89.0...v0.90.0](https://github.com/lithic-com/lithic-python/compare/v0.89.0...v0.90.0)
diff --git a/pyproject.toml b/pyproject.toml
index 7318e109..57649815 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "lithic"
-version = "0.90.0"
+version = "0.90.1"
 description = "The official Python library for the lithic API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/lithic/_utils/_transform.py b/src/lithic/_utils/_transform.py
index 3ec62081..3b2b8e00 100644
--- a/src/lithic/_utils/_transform.py
+++ b/src/lithic/_utils/_transform.py
@@ -12,6 +12,7 @@
 
 from ._utils import (
     is_list,
+    is_given,
     is_mapping,
     is_iterable,
 )
@@ -258,6 +259,11 @@ def _transform_typeddict(
     result: dict[str, object] = {}
     annotations = get_type_hints(expected_type, include_extras=True)
     for key, value in data.items():
+        if not is_given(value):
+            # we don't need to include `NotGiven` values here as they'll
+            # be stripped out before the request is sent anyway
+            continue
+
         type_ = annotations.get(key)
         if type_ is None:
             # we do not have a type annotation for this field, leave it as is
@@ -415,6 +421,11 @@ async def _async_transform_typeddict(
     result: dict[str, object] = {}
     annotations = get_type_hints(expected_type, include_extras=True)
     for key, value in data.items():
+        if not is_given(value):
+            # we don't need to include `NotGiven` values here as they'll
+            # be stripped out before the request is sent anyway
+            continue
+
         type_ = annotations.get(key)
         if type_ is None:
             # we do not have a type annotation for this field, leave it as is
diff --git a/src/lithic/_version.py b/src/lithic/_version.py
index 059797fb..e6e591b2 100644
--- a/src/lithic/_version.py
+++ b/src/lithic/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "lithic"
-__version__ = "0.90.0"  # x-release-please-version
+__version__ = "0.90.1"  # x-release-please-version
diff --git a/tests/test_transform.py b/tests/test_transform.py
index 7ce3274b..c5113270 100644
--- a/tests/test_transform.py
+++ b/tests/test_transform.py
@@ -8,7 +8,7 @@
 
 import pytest
 
-from lithic._types import Base64FileInput
+from lithic._types import NOT_GIVEN, Base64FileInput
 from lithic._utils import (
     PropertyInfo,
     transform as _transform,
@@ -444,3 +444,10 @@ async def test_transform_skipping(use_async: bool) -> None:
     # iterables of ints are converted to a list
     data = iter([1, 2, 3])
     assert await transform(data, Iterable[int], use_async) == [1, 2, 3]
+
+
+@parametrize
+@pytest.mark.asyncio
+async def test_strips_notgiven(use_async: bool) -> None:
+    assert await transform({"foo_bar": "bar"}, Foo1, use_async) == {"fooBar": "bar"}
+    assert await transform({"foo_bar": NOT_GIVEN}, Foo1, use_async) == {}