diff --git a/freqtrade/rpc/api_server/web_ui.py b/freqtrade/rpc/api_server/web_ui.py
index 6d7e77953..13d22a63e 100644
--- a/freqtrade/rpc/api_server/web_ui.py
+++ b/freqtrade/rpc/api_server/web_ui.py
@@ -10,7 +10,7 @@ router_ui = APIRouter()
 
 @router_ui.get('/favicon.ico', include_in_schema=False)
 async def favicon():
-    return FileResponse(Path(__file__).parent / 'ui/favicon.ico')
+    return FileResponse(str(Path(__file__).parent / 'ui/favicon.ico'))
 
 
 @router_ui.get('/{rest_of_path:path}', include_in_schema=False)