diff --git a/demos/streaming_asr_server/conf/ws_ds2_application.yaml b/demos/streaming_asr_server/conf/ws_ds2_application.yaml
index a4e6e9a1..955aecbb 100644
--- a/demos/streaming_asr_server/conf/ws_ds2_application.yaml
+++ b/demos/streaming_asr_server/conf/ws_ds2_application.yaml
@@ -39,13 +39,13 @@ asr_online-inference:
         summary: True  # False -> do not show predictor config
 
     chunk_buffer_conf:
-        frame_duration_ms: 80
+        frame_duration_ms: 85
         shift_ms: 40
         sample_rate: 16000
         sample_width: 2
         window_n: 7     # frame
         shift_n: 4      # frame
-        window_ms: 20   # ms
+        window_ms: 25   # ms
         shift_ms: 10    # ms
 
 
diff --git a/paddlespeech/server/conf/ws_ds2_application.yaml b/paddlespeech/server/conf/ws_ds2_application.yaml
index 430e6fd1..bcc218e6 100644
--- a/paddlespeech/server/conf/ws_ds2_application.yaml
+++ b/paddlespeech/server/conf/ws_ds2_application.yaml
@@ -74,11 +74,11 @@ asr_online-onnx:
         log_verbosity_level: 0  # VLOG level if DEBUG build and session_log_severity_level is 0. Applies to session load, initialization, etc. Default is 0.
 
     chunk_buffer_conf:
-        frame_duration_ms: 80
+        frame_duration_ms: 85
         shift_ms: 40
         sample_rate: 16000
         sample_width: 2
         window_n: 7     # frame
         shift_n: 4      # frame
-        window_ms: 20   # ms
-        shift_ms: 10    # ms
\ No newline at end of file
+        window_ms: 25   # ms
+        shift_ms: 10    # ms