Update app/main.py

app/main.py

@@ -300,12 +300,18 @@ async def audio_transcriptions(
     if prompt:
         data["prompt"] = prompt
 
+    safe_headers = {
+        k: v
+        for k, v in headers_with_auth.items()
+        if k.lower() != "content-type"
+    }
+    
     async with httpx.AsyncClient(timeout=timeout) as client:
         resp = await client.post(
             upstream_url,
             files=files,
             data=data,
-            headers=headers_with_auth
+            headers=safe_headers
         )
 
     return JSONResponse(status_code=resp.status_code, content=resp.json())