diff --git a/libs/cohere/langchain_cohere/rerank.py b/libs/cohere/langchain_cohere/rerank.py
index 9c832cc..989f476 100644
--- a/libs/cohere/langchain_cohere/rerank.py
+++ b/libs/cohere/langchain_cohere/rerank.py
@@ -24,6 +24,8 @@ class CohereRerank(BaseDocumentCompressor):
         COHERE_API_KEY."""
     user_agent: str = "langchain:partner"
     """Identifier for the application making the request."""
+    base_url: Optional[str] = None
+    """Override the default Cohere API URL."""
 
     class Config:
         """Configuration for this pydantic object."""
@@ -34,13 +36,18 @@ class Config:
     @root_validator()
     def validate_environment(cls, values: Dict) -> Dict:
         """Validate that api key and python package exists in environment."""
-        if not values.get("client"):
-            cohere_api_key = get_from_dict_or_env(
-                values, "cohere_api_key", "COHERE_API_KEY"
-            )
-            client_name = values["user_agent"]
-            values["client"] = cohere.Client(cohere_api_key, client_name=client_name)
-        return values
+        cohere_api_key = get_from_dict_or_env(
+            values, "cohere_api_key", "COHERE_API_KEY"
+        )
+        request_timeout = values.get("request_timeout")
+
+        client_name = values["user_agent"]
+        values["client"] = cohere.Client(
+            cohere_api_key,
+            timeout=request_timeout,
+            client_name=client_name,
+            base_url=values["base_url"],
+        )
 
     @root_validator()
     def validate_model_specified(cls, values: Dict) -> Dict: