diff --git a/src/elevenlabs/base_client.py b/src/elevenlabs/base_client.py
index 74cf7de..221fa93 100644
--- a/src/elevenlabs/base_client.py
+++ b/src/elevenlabs/base_client.py
@@ -93,7 +93,7 @@ def __init__(
         follow_redirects: typing.Optional[bool] = True,
         httpx_client: typing.Optional[httpx.Client] = None,
     ):
-        _defaulted_timeout = timeout if timeout is not None else 60 if httpx_client is None else httpx_client.timeout
+        _defaulted_timeout = timeout if timeout is not None else 60 if httpx_client is None else float(httpx_client.timeout)
         self._client_wrapper = SyncClientWrapper(
             base_url=_get_base_url(base_url=base_url, environment=environment),
             api_key=api_key,
@@ -172,7 +172,7 @@ def __init__(
         follow_redirects: typing.Optional[bool] = True,
         httpx_client: typing.Optional[httpx.AsyncClient] = None,
     ):
-        _defaulted_timeout = timeout if timeout is not None else 60 if httpx_client is None else httpx_client.timeout
+        _defaulted_timeout = timeout if timeout is not None else 60 if httpx_client is None else float(httpx_client.timeout)
         self._client_wrapper = AsyncClientWrapper(
             base_url=_get_base_url(base_url=base_url, environment=environment),
             api_key=api_key,