diff --git a/sdks/python-client/dify_client/client.py b/sdks/python-client/dify_client/client.py
index 791cb98a1b..201391eae9 100644
--- a/sdks/python-client/dify_client/client.py
+++ b/sdks/python-client/dify_client/client.py
@@ -139,9 +139,9 @@ class ChatClient(DifyClient):
         data = {"user": user}
         return self._send_request("DELETE", f"/conversations/{conversation_id}", data)
 
-    def audio_to_text(self, audio_file: dict, user: str):
+    def audio_to_text(self, audio_file: IO[bytes] | tuple, user: str):
         data = {"user": user}
-        files = {"audio_file": audio_file}
+        files = {"file": audio_file}
         return self._send_request_with_files("POST", "/audio-to-text", data, files)