diff --git a/package.json b/package.json
index 74002b2407..14ae4b4490 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,6 @@
   },
   "devDependencies": {
     "@stdy/cli": "0.22.2",
-    "pyright": "1.1.399"
+    "pyright": "1.1.413"
   }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 6596484c44..35fd49ecae 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -12,8 +12,8 @@ importers:
         specifier: 0.22.2
         version: 0.22.2
       pyright:
-        specifier: 1.1.399
-        version: 1.1.399
+        specifier: 1.1.413
+        version: 1.1.413
 
 packages:
 
@@ -52,8 +52,8 @@ packages:
     engines: {node: ^8.16.0 || ^10.6.0 || >=11.0.0}
     os: [darwin]
 
-  pyright@1.1.399:
-    resolution: {integrity: sha512-roYApcOUEraOc2gTZX052/cw/AZ5rQGkdG/2DtU1/KyhfP+C5zHDlvOT24qRgPXDDkh76AvFwq5quZ1SMahq7w==}
+  pyright@1.1.413:
+    resolution: {integrity: sha512-1lpxKrh0DHHpfAQOfciZo2ojua2jase3wwO9at8kldc+F/p1PBscxA5CQ3G1qg5lMOMhXo6ZaiMLMXEAqADIAg==}
     engines: {node: '>=14.0.0'}
     hasBin: true
 
@@ -85,6 +85,6 @@ snapshots:
   fsevents@2.3.3:
     optional: true
 
-  pyright@1.1.399:
+  pyright@1.1.413:
     optionalDependencies:
       fsevents: 2.3.3
diff --git a/src/openai/_response.py b/src/openai/_response.py
index acf31bdc4c..8b819ce812 100644
--- a/src/openai/_response.py
+++ b/src/openai/_response.py
@@ -243,7 +243,7 @@ def _parse(self, *, to: type[_T] | None = None) -> R | _T:
         # in the response, e.g. application/json; charset=utf-8
         content_type, *_ = response.headers.get("content-type", "*").split(";")
         if not content_type.endswith("json"):
-            if is_basemodel(cast_to):
+            if is_basemodel(cast(type, cast_to)):
                 try:
                     data = response.json()
                 except Exception as exc:
diff --git a/tests/lib/test_bedrock_credential_chain.py b/tests/lib/test_bedrock_credential_chain.py
index fec363aeb1..a2af4f5779 100644
--- a/tests/lib/test_bedrock_credential_chain.py
+++ b/tests/lib/test_bedrock_credential_chain.py
@@ -3,7 +3,7 @@
 import sys
 import json
 import threading
-from typing import Any, Iterator, cast
+from typing import Any, Generator, cast
 from pathlib import Path
 from datetime import datetime, timezone, timedelta
 from contextlib import contextmanager
@@ -102,7 +102,7 @@ def _assert_signed_with(request: httpx2.Request, name: str, *, region: str) -> N
 
 
 @contextmanager
-def _metadata_server() -> Iterator[tuple[str, list[tuple[str, str, str | None]]]]:
+def _metadata_server() -> Generator[tuple[str, list[tuple[str, str, str | None]]], None, None]:
     calls: list[tuple[str, str, str | None]] = []
 
     class Handler(BaseHTTPRequestHandler):
diff --git a/tests/node-tooling.test.cjs b/tests/node-tooling.test.cjs
index d9f676fe13..df41cecf30 100644
--- a/tests/node-tooling.test.cjs
+++ b/tests/node-tooling.test.cjs
@@ -22,7 +22,7 @@ function fixture(t) {
   return root;
 }
 
-function installFake(root, version = '1.1.399') {
+function installFake(root, version = JSON.parse(fs.readFileSync(path.join(root, 'package.json'))).devDependencies.pyright) {
   const directory = path.join(root, 'node_modules/pyright');
   fs.mkdirSync(directory, { recursive: true });
   fs.writeFileSync(path.join(directory, 'package.json'), JSON.stringify({ version }));
diff --git a/tests/test_module_client.py b/tests/test_module_client.py
index 4ef7cf51b6..6b8076c6f6 100644
--- a/tests/test_module_client.py
+++ b/tests/test_module_client.py
@@ -101,14 +101,14 @@ def test_http_client_option() -> None:
 
 
 import contextlib
-from typing import Iterator
+from typing import Generator
 
 from openai.lib.azure import AzureOpenAI, MutuallyExclusiveAuthError
 from openai.lib.bedrock import BedrockOpenAI
 
 
 @contextlib.contextmanager
-def fresh_env() -> Iterator[None]:
+def fresh_env() -> Generator[None, None, None]:
     old = _os.environ.copy()
 
     try:
diff --git a/tests/test_mtls_http_client.py b/tests/test_mtls_http_client.py
index ae3318c741..7db8432b42 100644
--- a/tests/test_mtls_http_client.py
+++ b/tests/test_mtls_http_client.py
@@ -9,7 +9,7 @@
 from pathlib import Path
 from contextlib import contextmanager
 from http.server import ThreadingHTTPServer, BaseHTTPRequestHandler
-from collections.abc import Iterator
+from collections.abc import Generator
 from typing_extensions import override
 
 import pytest
@@ -45,7 +45,7 @@ def log_message(self, format: str, *args: object) -> None:
 
 
 @contextmanager
-def _mtls_server() -> Iterator[ThreadingHTTPServer]:
+def _mtls_server() -> Generator[ThreadingHTTPServer, None, None]:
     _Handler.peer_certificates = []
     _Handler.request_paths = []
     server_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
diff --git a/tests/utils.py b/tests/utils.py
index e03ed1a039..dafbe17519 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -5,7 +5,7 @@
 import inspect
 import traceback
 import contextlib
-from typing import Any, TypeVar, Iterator, Sequence, ForwardRef, cast
+from typing import Any, TypeVar, Sequence, Generator, ForwardRef, cast
 from datetime import date, datetime
 from typing_extensions import Literal, get_args, get_origin, assert_type
 
@@ -168,7 +168,7 @@ def rich_print_str(obj: object) -> str:
 
 
 @contextlib.contextmanager
-def update_env(**new_env: str | Omit) -> Iterator[None]:
+def update_env(**new_env: str | Omit) -> Generator[None, None, None]:
     old = os.environ.copy()
 
     try: