diff --git a/paddlespeech/server/engine/tts/online/python/tts_engine.py b/paddlespeech/server/engine/tts/online/python/tts_engine.py
index 2c08521d..5be98925 100644
--- a/paddlespeech/server/engine/tts/online/python/tts_engine.py
+++ b/paddlespeech/server/engine/tts/online/python/tts_engine.py
@@ -44,7 +44,7 @@ class TTSServerExecutor(TTSExecutor):
         self.voc_block = voc_block
         self.voc_pad = voc_pad
         self.task_resource = CommonTaskResource(
-            task='tts', model_format='static', inference_mode='online')
+            task='tts', model_format='dynamic', inference_mode='online')
 
     def get_model_info(self,
                        field: str,