diff --git a/pyproject.toml b/pyproject.toml
index 3b2de47c..e70dab6b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,7 @@ Repository = "https://github.com/browserbase/sdk-python"
 managed = true
 # version pins are in requirements-dev.lock
 dev-dependencies = [
-    "pyright>=1.1.359",
+    "pyright==1.1.399",
     "mypy",
     "respx",
     "pytest",
diff --git a/requirements-dev.lock b/requirements-dev.lock
index 3a951fec..a26bd10f 100644
--- a/requirements-dev.lock
+++ b/requirements-dev.lock
@@ -69,7 +69,7 @@ pydantic-core==2.27.1
     # via pydantic
 pygments==2.18.0
     # via rich
-pyright==1.1.392.post0
+pyright==1.1.399
 pytest==8.3.3
     # via pytest-asyncio
 pytest-asyncio==0.24.0
diff --git a/src/browserbase/_base_client.py b/src/browserbase/_base_client.py
index e30de649..f25497c7 100644
--- a/src/browserbase/_base_client.py
+++ b/src/browserbase/_base_client.py
@@ -98,7 +98,11 @@
 _AsyncStreamT = TypeVar("_AsyncStreamT", bound=AsyncStream[Any])
 
 if TYPE_CHECKING:
-    from httpx._config import DEFAULT_TIMEOUT_CONFIG as HTTPX_DEFAULT_TIMEOUT
+    from httpx._config import (
+        DEFAULT_TIMEOUT_CONFIG,  # pyright: ignore[reportPrivateImportUsage]
+    )
+
+    HTTPX_DEFAULT_TIMEOUT = DEFAULT_TIMEOUT_CONFIG
 else:
     try:
         from httpx._config import DEFAULT_TIMEOUT_CONFIG as HTTPX_DEFAULT_TIMEOUT
diff --git a/src/browserbase/_models.py b/src/browserbase/_models.py
index 34935716..58b9263e 100644
--- a/src/browserbase/_models.py
+++ b/src/browserbase/_models.py
@@ -19,7 +19,6 @@
 )
 
 import pydantic
-import pydantic.generics
 from pydantic.fields import FieldInfo
 
 from ._types import (
diff --git a/src/browserbase/_utils/_typing.py b/src/browserbase/_utils/_typing.py
index 1958820f..1bac9542 100644
--- a/src/browserbase/_utils/_typing.py
+++ b/src/browserbase/_utils/_typing.py
@@ -110,7 +110,7 @@ class MyResponse(Foo[_T]):
     ```
     """
     cls = cast(object, get_origin(typ) or typ)
-    if cls in generic_bases:
+    if cls in generic_bases:  # pyright: ignore[reportUnnecessaryContains]
         # we're given the class directly
         return extract_type_arg(typ, index)
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 15ddbcad..94b8e723 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -10,7 +10,7 @@
 from browserbase import Browserbase, AsyncBrowserbase
 
 if TYPE_CHECKING:
-    from _pytest.fixtures import FixtureRequest
+    from _pytest.fixtures import FixtureRequest  # pyright: ignore[reportPrivateImportUsage]
 
 pytest.register_assert_rewrite("tests.utils")
 
diff --git a/tests/test_models.py b/tests/test_models.py
index 21043abd..f2a9c346 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -832,7 +832,7 @@ class B(BaseModel):
 
 @pytest.mark.skipif(not PYDANTIC_V2, reason="TypeAliasType is not supported in Pydantic v1")
 def test_type_alias_type() -> None:
-    Alias = TypeAliasType("Alias", str)
+    Alias = TypeAliasType("Alias", str)  # pyright: ignore
 
     class Model(BaseModel):
         alias: Alias