diff --git a/litellm/proxy/pass_through_endpoints/passthrough_endpoint_router.py b/litellm/proxy/pass_through_endpoints/passthrough_endpoint_router.py
index 65729adb3e5..dc53686b3cc 100644
--- a/litellm/proxy/pass_through_endpoints/passthrough_endpoint_router.py
+++ b/litellm/proxy/pass_through_endpoints/passthrough_endpoint_router.py
@@ -22,7 +22,7 @@ def _get_proxy_llm_router() -> "Router | None":
     return llm_router
 
 
-def _get_str_value(values: dict | None, key: str) -> str | None:
+def _get_str_value(values: dict[str, object] | None, key: str) -> str | None:
     value: Final = values.get(key) if values is not None else None
     return value if isinstance(value, str) else None
 
diff --git a/litellm/types/router.py b/litellm/types/router.py
index ddb575545ea..86811dc5b3c 100644
--- a/litellm/types/router.py
+++ b/litellm/types/router.py
@@ -382,8 +382,8 @@ class LiteLLMParamsTypedDict(TypedDict, total=False):
     ## RESPONSES API → CHAT COMPLETIONS BRIDGE ##
     use_chat_completions_api: Optional[bool]
     ## PASS-THROUGH ENDPOINTS ##
-    use_in_pass_through: Optional[bool]
-    litellm_credential_name: Optional[str]
+    use_in_pass_through: bool | None
+    litellm_credential_name: str | None
     ## UNIFIED PROJECT/REGION ##
     region_name: Optional[str]
     ## VERTEX AI ##