diff --git a/.stats.yml b/.stats.yml
index a85d0c3..3273a31 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,2 +1,2 @@
 configured_endpoints: 12
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/writerai%2Fwriter-5ec9075c9a60b855ae0ac9907a6c2a4c6216fb2087d8d47125aec013ebc5f3d5.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/writerai%2Fwriter-ca8da7974057afac39ab3f38dbd707d4db9ea11fa15d95061c82642ca4c79ef8.yml
diff --git a/src/writerai/resources/files.py b/src/writerai/resources/files.py
index c1e7e78..d30a6f4 100644
--- a/src/writerai/resources/files.py
+++ b/src/writerai/resources/files.py
@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+from typing import List
 from typing_extensions import Literal
 
 import httpx
@@ -41,7 +42,7 @@ def list(
         *,
         after: str | NotGiven = NOT_GIVEN,
         before: str | NotGiven = NOT_GIVEN,
-        graph_id: str | NotGiven = NOT_GIVEN,
+        graph_id: List[str] | NotGiven = NOT_GIVEN,
         limit: int | NotGiven = NOT_GIVEN,
         order: Literal["asc", "desc"] | NotGiven = NOT_GIVEN,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
@@ -156,7 +157,7 @@ def list(
         *,
         after: str | NotGiven = NOT_GIVEN,
         before: str | NotGiven = NOT_GIVEN,
-        graph_id: str | NotGiven = NOT_GIVEN,
+        graph_id: List[str] | NotGiven = NOT_GIVEN,
         limit: int | NotGiven = NOT_GIVEN,
         order: Literal["asc", "desc"] | NotGiven = NOT_GIVEN,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
diff --git a/src/writerai/types/file_list_params.py b/src/writerai/types/file_list_params.py
index 1a80301..a890be7 100644
--- a/src/writerai/types/file_list_params.py
+++ b/src/writerai/types/file_list_params.py
@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+from typing import List
 from typing_extensions import Literal, TypedDict
 
 __all__ = ["FileListParams"]
@@ -20,7 +21,7 @@ class FileListParams(TypedDict, total=False):
     This parameter instructs the API to return the previous page of results.
     """
 
-    graph_id: str
+    graph_id: List[str]
     """The unique identifier of the graph to which the files belong."""
 
     limit: int
diff --git a/tests/api_resources/test_files.py b/tests/api_resources/test_files.py
index 925cde4..e947e98 100644
--- a/tests/api_resources/test_files.py
+++ b/tests/api_resources/test_files.py
@@ -28,7 +28,11 @@ def test_method_list_with_all_params(self, client: Writer) -> None:
         file = client.files.list(
             after="after",
             before="before",
-            graph_id="182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
+            graph_id=[
+                "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
+                "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
+                "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
+            ],
             limit=0,
             order="asc",
         )
@@ -111,7 +115,11 @@ async def test_method_list_with_all_params(self, async_client: AsyncWriter) -> N
         file = await async_client.files.list(
             after="after",
             before="before",
-            graph_id="182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
+            graph_id=[
+                "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
+                "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
+                "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
+            ],
             limit=0,
             order="asc",
         )