diff --git a/modelscope/models/audio/asr/generic_automatic_speech_recognition.py b/modelscope/models/audio/asr/generic_automatic_speech_recognition.py
index 11accf0a..aebc6751 100644
--- a/modelscope/models/audio/asr/generic_automatic_speech_recognition.py
+++ b/modelscope/models/audio/asr/generic_automatic_speech_recognition.py
@@ -1,3 +1,5 @@
+# Copyright (c) Alibaba, Inc. and its affiliates.
+
 import os
 from typing import Any, Dict
 
diff --git a/modelscope/models/audio/kws/generic_key_word_spotting.py b/modelscope/models/audio/kws/generic_key_word_spotting.py
index c1b7a0e4..2f70327d 100644
--- a/modelscope/models/audio/kws/generic_key_word_spotting.py
+++ b/modelscope/models/audio/kws/generic_key_word_spotting.py
@@ -1,3 +1,5 @@
+# Copyright (c) Alibaba, Inc. and its affiliates.
+
 import os
 from typing import Any, Dict
 
diff --git a/modelscope/pipelines/audio/kws_kwsbp_pipeline.py b/modelscope/pipelines/audio/kws_kwsbp_pipeline.py
index 450a12bb..5555c9e6 100644
--- a/modelscope/pipelines/audio/kws_kwsbp_pipeline.py
+++ b/modelscope/pipelines/audio/kws_kwsbp_pipeline.py
@@ -37,6 +37,12 @@ class KeyWordSpottingKwsbpPipeline(Pipeline):
                  **kwargs) -> Dict[str, Any]:
         if 'keywords' in kwargs.keys():
             self.keywords = kwargs['keywords']
+            if isinstance(self.keywords, str):
+                word_list = []
+                word = {}
+                word['keyword'] = self.keywords
+                word_list.append(word)
+                self.keywords = word_list
         else:
             self.keywords = None
 
@@ -96,6 +102,9 @@ class KeyWordSpottingKwsbpPipeline(Pipeline):
             pos_list=pos_kws_list,
             neg_list=neg_kws_list)
 
+        if 'kws_list' not in rst_dict:
+            rst_dict['kws_list'] = []
+
         return rst_dict
 
     def run_with_kwsbp(self, inputs: Dict[str, Any]) -> Dict[str, Any]:
diff --git a/modelscope/preprocessors/asr.py b/modelscope/preprocessors/asr.py
index d58383d7..facaa132 100644
--- a/modelscope/preprocessors/asr.py
+++ b/modelscope/preprocessors/asr.py
@@ -1,3 +1,5 @@
+# Copyright (c) Alibaba, Inc. and its affiliates.
+
 import os
 from typing import Any, Dict, List, Union
 
diff --git a/modelscope/preprocessors/kws.py b/modelscope/preprocessors/kws.py
index 9c370ed5..6f09d545 100644
--- a/modelscope/preprocessors/kws.py
+++ b/modelscope/preprocessors/kws.py
@@ -1,3 +1,5 @@
+# Copyright (c) Alibaba, Inc. and its affiliates.
+
 import os
 from typing import Any, Dict, List, Union
 
diff --git a/tests/pipelines/test_key_word_spotting.py b/tests/pipelines/test_key_word_spotting.py
index 91f9f566..f31d212b 100644
--- a/tests/pipelines/test_key_word_spotting.py
+++ b/tests/pipelines/test_key_word_spotting.py
@@ -245,7 +245,7 @@ class KeyWordSpottingTest(unittest.TestCase, DemoCompatibilityCheck):
 
     @unittest.skipUnless(test_level() >= 0, 'skip test in current test level')
     def test_run_with_wav_by_customized_keywords(self):
-        keywords = [{'keyword': '播放音乐'}]
+        keywords = '播放音乐'
 
         kws_result = self.run_pipeline(
             model_id=self.model_id,