diff --git a/litellm/llms/bedrock/rerank/handler.py b/litellm/llms/bedrock/rerank/handler.py
index f5a532bec15..06f1e9e86c9 100644
--- a/litellm/llms/bedrock/rerank/handler.py
+++ b/litellm/llms/bedrock/rerank/handler.py
@@ -34,7 +34,7 @@ class BedrockRerankHandler(BaseAWSLLM):
         if client is None:
             client = get_async_httpx_client(llm_provider=litellm.LlmProviders.BEDROCK)
         try:
-            response = await client.post(url=prepared_request["endpoint_url"], headers=prepared_request["prepped"].headers, data=prepared_request["body"])  # type: ignore
+            response = await client.post(url=prepared_request["endpoint_url"], headers=dict(prepared_request["prepped"].headers), data=prepared_request["body"])
             response.raise_for_status()
         except httpx.HTTPStatusError as err:
             error_code = err.response.status_code
@@ -84,7 +84,7 @@ class BedrockRerankHandler(BaseAWSLLM):
             additional_args={
                 "complete_input_dict": data,
                 "api_base": prepared_request["endpoint_url"],
-                "headers": prepared_request["prepped"].headers,
+                "headers": dict(prepared_request["prepped"].headers),
             },
         )
 
@@ -94,7 +94,7 @@ class BedrockRerankHandler(BaseAWSLLM):
         if client is None or not isinstance(client, HTTPHandler):
             client = _get_httpx_client()
         try:
-            response = client.post(url=prepared_request["endpoint_url"], headers=prepared_request["prepped"].headers, data=prepared_request["body"])  # type: ignore
+            response = client.post(url=prepared_request["endpoint_url"], headers=dict(prepared_request["prepped"].headers), data=prepared_request["body"])
             response.raise_for_status()
         except httpx.HTTPStatusError as err:
             error_code = err.response.status_code
diff --git a/litellm/rerank_api/main.py b/litellm/rerank_api/main.py
index 3a2b75e58da..5eb65be6a2c 100644
--- a/litellm/rerank_api/main.py
+++ b/litellm/rerank_api/main.py
@@ -358,6 +358,7 @@ def rerank(  # noqa: PLR0915
                 _is_async=_is_async,
                 optional_params=optional_params.model_dump(exclude_unset=True),
                 api_base=api_base,
+                extra_headers=headers or litellm.headers or {},
                 logging_obj=litellm_logging_obj,
                 client=client,
             )