diff --git a/backend/main/xiaozhi-server/core/providers/tts/sherpa_tts.py b/backend/main/xiaozhi-server/core/providers/tts/sherpa_tts.py
index ada9fda..04b2e5c 100644
--- a/backend/main/xiaozhi-server/core/providers/tts/sherpa_tts.py
+++ b/backend/main/xiaozhi-server/core/providers/tts/sherpa_tts.py
@@ -23,7 +23,7 @@ class TTSProvider(TTSProviderBase):
         if not os.path.exists(model_file):
             model_file = f"{model_dir}/model.onnx"
 
-        num_threads = int(config.get("num_threads", 4))
+        num_threads = int(config.get("num_threads", 8))
 
         tts_config = sherpa_onnx.OfflineTtsConfig(
             model=sherpa_onnx.OfflineTtsModelConfig(