diff --git a/.stats.yml b/.stats.yml
index 22ef4cf..842eb9a 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,2 +1,2 @@
 configured_endpoints: 18
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/browserbase%2Fbrowserbase-1e31d897af1fa5faba941e1170e9de8bbdbd169f84468a5554df02d807d2fa05.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/browserbase%2Fbrowserbase-f1ba1f2c1512973c1640f7e2d27c72c4f5c49ec07e70b026d52818e7f8b1468e.yml
diff --git a/src/browserbase/types/session_create_params.py b/src/browserbase/types/session_create_params.py
index b026c9f..d792889 100644
--- a/src/browserbase/types/session_create_params.py
+++ b/src/browserbase/types/session_create_params.py
@@ -110,6 +110,9 @@ class BrowserSettingsViewport(TypedDict, total=False):
 
 
 class BrowserSettings(TypedDict, total=False):
+    advanced_stealth: Annotated[bool, PropertyInfo(alias="advancedStealth")]
+    """Advanced Browser Stealth Mode"""
+
     block_ads: Annotated[bool, PropertyInfo(alias="blockAds")]
     """Enable or disable ad blocking in the browser. Defaults to `false`."""
 
diff --git a/tests/api_resources/test_sessions.py b/tests/api_resources/test_sessions.py
index 597090a..bdc52b9 100644
--- a/tests/api_resources/test_sessions.py
+++ b/tests/api_resources/test_sessions.py
@@ -34,6 +34,7 @@ def test_method_create_with_all_params(self, client: Browserbase) -> None:
         session = client.sessions.create(
             project_id="projectId",
             browser_settings={
+                "advanced_stealth": True,
                 "block_ads": True,
                 "context": {
                     "id": "id",
@@ -265,6 +266,7 @@ async def test_method_create_with_all_params(self, async_client: AsyncBrowserbas
         session = await async_client.sessions.create(
             project_id="projectId",
             browser_settings={
+                "advanced_stealth": True,
                 "block_ads": True,
                 "context": {
                     "id": "id",