diff --git a/backend/open_webui/routers/audio.py b/backend/open_webui/routers/audio.py
index 17bb32f35c4f..d27b01d21662 100644
--- a/backend/open_webui/routers/audio.py
+++ b/backend/open_webui/routers/audio.py
@@ -1284,6 +1284,9 @@ async def get_available_models(request: Request) -> list[dict]:
                     f'{base_url}/audio/models',
                     ssl=AIOHTTP_CLIENT_SESSION_SSL,
                     timeout=_timeout,
+                    headers={
+                        "Authorization": f"Bearer {request.app.state.config.TTS_API_KEY}",
+                    },
                 ) as resp:
                     resp.raise_for_status()
                     data = await resp.json()
@@ -1295,6 +1298,9 @@ async def get_available_models(request: Request) -> list[dict]:
                         f'{base_url}/models',
                         ssl=AIOHTTP_CLIENT_SESSION_SSL,
                         timeout=_timeout,
+                        headers={
+                            "Authorization": f"Bearer {request.app.state.config.TTS_API_KEY}",
+                        },
                     ) as resp:
                         resp.raise_for_status()
                         data = await resp.json()
@@ -1358,6 +1364,9 @@ async def get_available_voices(request) -> dict:
                     f'{base_url}/audio/voices',
                     ssl=AIOHTTP_CLIENT_SESSION_SSL,
                     timeout=_timeout,
+                    headers={
+                        "Authorization": f"Bearer {request.app.state.config.TTS_API_KEY}",
+                    },
                 ) as resp:
                     resp.raise_for_status()
                     data = await resp.json()
@@ -1436,4 +1445,4 @@ async def get_available_voices(request) -> dict:
 
 @router.get('/voices')
 async def get_voices(request: Request, user=Depends(get_verified_user)):
-    return {'voices': [{'id': k, 'name': v} for k, v in (await get_available_voices(request)).items()]}
+    return {'voices': [{'id': k, 'name': v} for k, v in (await get_available_voices(request)).items()]}
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