diff --git a/README.md b/README.md
index 72db64b7d..c80a31fde 100644
--- a/README.md
+++ b/README.md
@@ -183,19 +183,19 @@ Via the easy-to-use, efficient, flexible and scalable implementation, our vision
 
 ## Installation
 
-We strongly recommend our users to install PaddleSpeech in **Linux** with *python>=3.7* and *paddlepaddle>=2.3.1*.
+We strongly recommend our users to install PaddleSpeech in **Linux** with *python>=3.7* and *paddlepaddle>=2.4rc*.
 
 ### **Dependency Introduction**
 
 + gcc >= 4.8.5
-+ paddlepaddle >= 2.3.1
++ paddlepaddle >= 2.4rc
 + python >= 3.7
 + OS support:  Linux(recommend), Windows, Mac OSX
 
 PaddleSpeech depends on paddlepaddle. For installation, please refer to the official website of [paddlepaddle](https://www.paddlepaddle.org.cn/en) and choose according to your own machine. Here is an example of the cpu version.
 
 ```bash
-pip install paddlepaddle -i https://mirror.baidu.com/pypi/simple
+pip install paddlepaddle==2.4.0rc0 -i https://mirror.baidu.com/pypi/simple
 ```
 
 There are two quick installation methods for PaddleSpeech, one is pip installation, and the other is source code compilation (recommended).
diff --git a/README_cn.md b/README_cn.md
index 725f7eda1..49f42dae5 100644
--- a/README_cn.md
+++ b/README_cn.md
@@ -215,14 +215,14 @@
 
 ### 相关依赖
 + gcc >= 4.8.5
-+ paddlepaddle >= 2.3.1
++ paddlepaddle >= 2.4rc
 + python >= 3.7
 + linux(推荐), mac, windows
 
 PaddleSpeech 依赖于 paddlepaddle，安装可以参考[ paddlepaddle 官网](https://www.paddlepaddle.org.cn/)，根据自己机器的情况进行选择。这里给出 cpu 版本示例，其它版本大家可以根据自己机器的情况进行安装。
 
 ```shell
-pip install paddlepaddle -i https://mirror.baidu.com/pypi/simple
+pip install paddlepaddle==2.4.0rc0 -i https://mirror.baidu.com/pypi/simple
 ```
 
 PaddleSpeech 快速安装方式有两种，一种是 pip 安装，一种是源码编译（推荐）。
diff --git a/demos/speech_server/README.md b/demos/speech_server/README.md
index e400f7e74..7e7d4b2c5 100644
--- a/demos/speech_server/README.md
+++ b/demos/speech_server/README.md
@@ -13,7 +13,7 @@ For service interface definition, please check:
 ### 1. Installation
 see [installation](https://github.com/PaddlePaddle/PaddleSpeech/blob/develop/docs/source/install.md).
 
-It is recommended to use **paddlepaddle 2.3.1** or above.
+It is recommended to use **paddlepaddle 2.4rc** or above.
 
 You can choose one way from easy, meduim and hard to install paddlespeech.
 
diff --git a/demos/speech_server/README_cn.md b/demos/speech_server/README_cn.md
index 628468c83..594928281 100644
--- a/demos/speech_server/README_cn.md
+++ b/demos/speech_server/README_cn.md
@@ -14,7 +14,7 @@
 ### 1. 安装
 请看 [安装文档](https://github.com/PaddlePaddle/PaddleSpeech/blob/develop/docs/source/install.md).
 
-推荐使用 **paddlepaddle 2.3.1** 或以上版本。
+推荐使用 **paddlepaddle 2.4rc** 或以上版本。
 
 你可以从简单，中等，困难 几种方式中选择一种方式安装 PaddleSpeech。
 
diff --git a/demos/streaming_asr_server/README.md b/demos/streaming_asr_server/README.md
index a97486757..5eef82866 100644
--- a/demos/streaming_asr_server/README.md
+++ b/demos/streaming_asr_server/README.md
@@ -14,7 +14,7 @@ Streaming ASR server only support `websocket` protocol, and doesn't support `htt
 ### 1. Installation
 see [installation](https://github.com/PaddlePaddle/PaddleSpeech/blob/develop/docs/source/install.md).
 
-It is recommended to use **paddlepaddle 2.3.1** or above.
+It is recommended to use **paddlepaddle 2.4rc** or above.
 
 You can choose one way from easy, meduim and hard to install paddlespeech.
 
diff --git a/demos/streaming_asr_server/README_cn.md b/demos/streaming_asr_server/README_cn.md
index 267367729..1902a2fa9 100644
--- a/demos/streaming_asr_server/README_cn.md
+++ b/demos/streaming_asr_server/README_cn.md
@@ -14,7 +14,7 @@
 ### 1. 安装
 安装 PaddleSpeech 的详细过程请看 [安装文档](https://github.com/PaddlePaddle/PaddleSpeech/blob/develop/docs/source/install.md)。
 
-推荐使用 **paddlepaddle 2.3.1** 或以上版本。
+推荐使用 **paddlepaddle 2.4rc** 或以上版本。
 
 你可以从简单，中等，困难 几种方式中选择一种方式安装 PaddleSpeech。
 
diff --git a/demos/streaming_tts_server/README.md b/demos/streaming_tts_server/README.md
index 15448a46f..ca5d6f1f8 100644
--- a/demos/streaming_tts_server/README.md
+++ b/demos/streaming_tts_server/README.md
@@ -13,7 +13,7 @@ For service interface definition, please check:
 ### 1. Installation
 see [installation](https://github.com/PaddlePaddle/PaddleSpeech/blob/develop/docs/source/install.md).
 
-It is recommended to use **paddlepaddle 2.3.1** or above.
+It is recommended to use **paddlepaddle 2.4rc** or above.
 
 You can choose one way from easy, meduim and hard to install paddlespeech.
 
diff --git a/demos/streaming_tts_server/README_cn.md b/demos/streaming_tts_server/README_cn.md
index b99155bca..125f37033 100644
--- a/demos/streaming_tts_server/README_cn.md
+++ b/demos/streaming_tts_server/README_cn.md
@@ -12,7 +12,7 @@
 ### 1. 安装
 请看 [安装文档](https://github.com/PaddlePaddle/PaddleSpeech/blob/develop/docs/source/install.md).
 
-推荐使用 **paddlepaddle 2.3.1** 或以上版本。
+推荐使用 **paddlepaddle 2.4rc** 或以上版本。
 
 你可以从简单，中等，困难 几种方式中选择一种方式安装 PaddleSpeech。
 
diff --git a/docker/ubuntu16-gpu/Dockerfile b/docker/ubuntu16-gpu/Dockerfile
index f275471ee..a8c11e37b 100644
--- a/docker/ubuntu16-gpu/Dockerfile
+++ b/docker/ubuntu16-gpu/Dockerfile
@@ -62,7 +62,7 @@ RUN mkdir -p ~/.pip && echo "[global]" > ~/.pip/pip.conf && \
     echo "index-url=https://mirror.baidu.com/pypi/simple" >> ~/.pip/pip.conf && \
     echo "trusted-host=mirror.baidu.com" >> ~/.pip/pip.conf && \
     python3 -m pip install --upgrade pip && \
-    pip install paddlepaddle-gpu==2.3.1.post112 -f https://www.paddlepaddle.org.cn/whl/linux/mkl/avx/stable.html && \
+    pip install paddlepaddle-gpu==2.4.0rc0.post112 -f https://www.paddlepaddle.org.cn/whl/linux/mkl/avx/stable.html && \
     rm -rf ~/.cache/pip
 
 RUN git clone https://github.com/PaddlePaddle/PaddleSpeech.git && cd PaddleSpeech && \
diff --git a/docs/source/install.md b/docs/source/install.md
index 6a9ff3bc8..187bd4ea0 100644
--- a/docs/source/install.md
+++ b/docs/source/install.md
@@ -58,7 +58,7 @@ pip install pytest-runner -i https://pypi.tuna.tsinghua.edu.cn/simple
 ```
 Then you can use the following commands:
 ```bash
-pip install paddlepaddle -i https://mirror.baidu.com/pypi/simple
+pip install paddlepaddle==2.4.0rc0 -i https://mirror.baidu.com/pypi/simple
 pip install paddlespeech -i https://pypi.tuna.tsinghua.edu.cn/simple
 ```
 > If you encounter problem with downloading **nltk_data** while using paddlespeech, it maybe due to your poor network, we suggest you download the [nltk_data](https://paddlespeech.bj.bcebos.com/Parakeet/tools/nltk_data.tar.gz) provided by us, and extract it to your `${HOME}`.
@@ -117,9 +117,13 @@ conda install -y -c gcc_linux-64=8.4.0 gxx_linux-64=8.4.0
 ```
 (Hip: Do not use the last script if you want to install by **Hard** way):
 ### Install PaddlePaddle
-You can choose the `PaddlePaddle` version based on your system. For example, for CUDA 10.2, CuDNN7.5 install paddlepaddle-gpu 2.3.1:
+You can choose the `PaddlePaddle` version based on your system. For example, for CUDA 10.2, CuDNN7.5 install paddlepaddle-gpu 2.4rc:
 ```bash
-python3 -m pip install paddlepaddle-gpu==2.3.1 -i https://mirror.baidu.com/pypi/simple
+python3 -m pip install paddlepaddle-gpu==2.4.0rc0 -i https://mirror.baidu.com/pypi/simple
+```
+You can also install the develop version of paddlepaddle. For example, for CUDA 10.2, CuDNN7.5 install paddlepaddle-gpu develop:
+```bash
+python3 -m pip install paddlepaddle-gpu==0.0.0.post102 -f https://www.paddlepaddle.org.cn/whl/linux/gpu/develop.html
 ```
 ### Install PaddleSpeech 
 You can install  `paddlespeech`  by the following command，then you can use the `ready-made` examples in `paddlespeech` :
@@ -180,9 +184,13 @@ Some users may fail to install `kaldiio` due to the default download source, you
 ```bash
 pip install pytest-runner -i https://pypi.tuna.tsinghua.edu.cn/simple
 ```
-Make sure you have GPU and the paddlepaddle version is right. For example, for CUDA 10.2, CuDNN7.5 install paddle 2.3.1:
+Make sure you have GPU and the paddlepaddle version is right. For example, for CUDA 10.2, CuDNN7.5 install paddle 2.4rc:
+```bash
+python3 -m pip install paddlepaddle-gpu==2.4.0rc0 -i https://mirror.baidu.com/pypi/simple
+```
+You can also install the develop version of paddlepaddle. For example, for CUDA 10.2, CuDNN7.5 install paddlepaddle-gpu develop:
 ```bash
-python3 -m pip install paddlepaddle-gpu==2.3.1 -i https://mirror.baidu.com/pypi/simple
+python3 -m pip install paddlepaddle-gpu==0.0.0.post102 -f https://www.paddlepaddle.org.cn/whl/linux/gpu/develop.html
 ```
 ### Install PaddleSpeech in Developing Mode
 ```bash
diff --git a/docs/source/install_cn.md b/docs/source/install_cn.md
index 9f49ebad6..9936a214a 100644
--- a/docs/source/install_cn.md
+++ b/docs/source/install_cn.md
@@ -55,8 +55,8 @@ pip install pytest-runner -i https://pypi.tuna.tsinghua.edu.cn/simple
 ```
 然后你可以使用如下命令：
 ```bash
-pip install paddlepaddle -i https://mirror.baidu.com/pypi/simple
-pip install paddlespeech -i https://pypi.tuna.tsinghua.edu.cn/simple 
+pip install paddlepaddle==2.4.0rc0 -i https://mirror.baidu.com/pypi/simple
+pip install paddlespeech -i https://pypi.tuna.tsinghua.edu.cn/simple
 ```
 > 如果您在使用 paddlespeech 的过程中遇到关于下载 **nltk_data** 的问题，可能是您的网络不佳，我们建议您下载我们提供的 [nltk_data](https://paddlespeech.bj.bcebos.com/Parakeet/tools/nltk_data.tar.gz) 并解压缩到您的 `${HOME}` 目录下。
 
@@ -111,9 +111,13 @@ conda install -y -c gcc_linux-64=8.4.0 gxx_linux-64=8.4.0
 ```
 （提示： 如果你想使用**困难**方式完成安装，请不要使用最后一条命令）
 ### 安装 PaddlePaddle
-你可以根据系统配置选择 PaddlePaddle 版本，例如系统使用 CUDA 10.2， CuDNN7.5 ，你可以安装 paddlepaddle-gpu 2.3.1：
+你可以根据系统配置选择 PaddlePaddle 版本，例如系统使用 CUDA 10.2， CuDNN7.5 ，你可以安装 paddlepaddle-gpu 2.4rc：
 ```bash
-python3 -m pip install paddlepaddle-gpu==2.3.1 -i https://mirror.baidu.com/pypi/simple
+python3 -m pip install paddlepaddle-gpu==2.4.0rc0 -i https://mirror.baidu.com/pypi/simple
+```
+你也可以安装 develop 版本的PaddlePaddle. 例如系统使用 CUDA 10.2， CuDNN7.5 ，你可以安装 paddlepaddle-gpu develop:
+```bash
+python3 -m pip install paddlepaddle-gpu==0.0.0.post102 -f https://www.paddlepaddle.org.cn/whl/linux/gpu/develop.html
 ```
 ### 安装 PaddleSpeech
 最后安装 `paddlespeech`，这样你就可以使用 `paddlespeech` 中已有的 examples：
@@ -168,9 +172,13 @@ conda activate tools/venv
 conda install -y -c conda-forge sox libsndfile swig bzip2 libflac bc
 ```
 ### 安装 PaddlePaddle
-请确认你系统是否有 GPU，并且使用了正确版本的 paddlepaddle。例如系统使用 CUDA 10.2, CuDNN7.5 ，你可以安装 paddlepaddle-gpu 2.3.1：
+请确认你系统是否有 GPU，并且使用了正确版本的 paddlepaddle。例如系统使用 CUDA 10.2, CuDNN7.5 ，你可以安装 paddlepaddle-gpu 2.4rc：
+```bash
+python3 -m pip install paddlepaddle-gpu==2.4.0rc0 -i https://mirror.baidu.com/pypi/simple
+```
+你也可以安装 develop 版本的PaddlePaddle. 例如系统使用 CUDA 10.2， CuDNN7.5 ，你可以安装 paddlepaddle-gpu develop:
 ```bash
-python3 -m pip install paddlepaddle-gpu==2.3.1 -i https://mirror.baidu.com/pypi/simple
+python3 -m pip install paddlepaddle-gpu==0.0.0.post102 -f https://www.paddlepaddle.org.cn/whl/linux/gpu/develop.html
 ```
 ### 用开发者模式安装 PaddleSpeech
 部分用户系统由于默认源的问题，安装中会出现 kaldiio 安转出错的问题，建议首先安装 pytest-runner:
diff --git a/docs/source/released_model.md b/docs/source/released_model.md
index bdac2c5bb..a2456f1fe 100644
--- a/docs/source/released_model.md
+++ b/docs/source/released_model.md
@@ -9,7 +9,7 @@ Acoustic Model | Training Data | Token-based | Size | Descriptions | CER | WER |
 [Ds2 Online Aishell ASR0 Model](https://paddlespeech.bj.bcebos.com/s2t/aishell/asr0/asr0_deepspeech2_online_aishell_fbank161_ckpt_0.2.1.model.tar.gz) | Aishell Dataset | Char-based | 491 MB  | 2 Conv + 5 LSTM layers | 0.0666 |-| 151 h | [D2 Online Aishell ASR0](../../examples/aishell/asr0) | onnx/inference/python |
 [Ds2 Offline Aishell ASR0 Model](https://paddlespeech.bj.bcebos.com/s2t/aishell/asr0/asr0_deepspeech2_offline_aishell_ckpt_1.0.1.model.tar.gz)| Aishell Dataset | Char-based | 1.4 GB | 2 Conv + 5 bidirectional LSTM layers| 0.0554 |-| 151 h | [Ds2 Offline Aishell ASR0](../../examples/aishell/asr0) | inference/python |
 [Conformer Online Wenetspeech ASR1 Model](https://paddlespeech.bj.bcebos.com/s2t/wenetspeech/asr1/asr1_chunk_conformer_wenetspeech_ckpt_1.0.0a.model.tar.gz) | WenetSpeech Dataset | Char-based | 457 MB  | Encoder:Conformer, Decoder:Transformer, Decoding method: Attention rescoring| 0.11 (test\_net) 0.1879 (test\_meeting) |-| 10000 h |- | python |
-[Conformer U2PP Online Wenetspeech ASR1 Model](https://paddlespeech.bj.bcebos.com/s2t/wenetspeech/asr1/asr1_chunk_conformer_u2pp_wenetspeech_ckpt_1.1.1.model.tar.gz) | WenetSpeech Dataset | Char-based | 476 MB  | Encoder:Conformer, Decoder:BiTransformer, Decoding method: Attention rescoring| 0.047198 (aishell test\_-1) 0.059212 (aishell test\_16) |-| 10000 h |- | python |
+[Conformer U2PP Online Wenetspeech ASR1 Model](https://paddlespeech.bj.bcebos.com/s2t/wenetspeech/asr1/asr1_chunk_conformer_u2pp_wenetspeech_ckpt_1.1.4.model.tar.gz) | WenetSpeech Dataset | Char-based | 476 MB  | Encoder:Conformer, Decoder:BiTransformer, Decoding method: Attention rescoring| 0.047198 (aishell test\_-1) 0.059212 (aishell test\_16) |-| 10000 h |- | python |
 [Conformer Online Aishell ASR1 Model](https://paddlespeech.bj.bcebos.com/s2t/aishell/asr1/asr1_chunk_conformer_aishell_ckpt_0.2.0.model.tar.gz) | Aishell Dataset | Char-based | 189 MB  | Encoder:Conformer, Decoder:Transformer, Decoding method: Attention rescoring| 0.0544 |-| 151 h | [Conformer Online Aishell ASR1](../../examples/aishell/asr1) | python |
 [Conformer Offline Aishell ASR1 Model](https://paddlespeech.bj.bcebos.com/s2t/aishell/asr1/asr1_conformer_aishell_ckpt_1.0.1.model.tar.gz) | Aishell Dataset | Char-based | 189 MB  | Encoder:Conformer, Decoder:Transformer, Decoding method: Attention rescoring | 0.0460 |-| 151 h | [Conformer Offline Aishell ASR1](../../examples/aishell/asr1) | python |
 [Transformer Aishell ASR1 Model](https://paddlespeech.bj.bcebos.com/s2t/aishell/asr1/asr1_transformer_aishell_ckpt_0.1.1.model.tar.gz) | Aishell Dataset | Char-based | 128 MB | Encoder:Transformer, Decoder:Transformer, Decoding method: Attention rescoring | 0.0523 || 151 h | [Transformer  Aishell ASR1](../../examples/aishell/asr1) | python |
diff --git a/paddlespeech/resource/pretrained_models.py b/paddlespeech/resource/pretrained_models.py
index 0103651bc..efd6bb3f2 100644
--- a/paddlespeech/resource/pretrained_models.py
+++ b/paddlespeech/resource/pretrained_models.py
@@ -71,9 +71,9 @@ asr_dynamic_pretrained_models = {
     "conformer_u2pp_wenetspeech-zh-16k": {
         '1.1': {
             'url':
-            'https://paddlespeech.bj.bcebos.com/s2t/wenetspeech/asr1/asr1_chunk_conformer_u2pp_wenetspeech_ckpt_1.1.1.model.tar.gz',
+            'https://paddlespeech.bj.bcebos.com/s2t/wenetspeech/asr1/asr1_chunk_conformer_u2pp_wenetspeech_ckpt_1.1.3.model.tar.gz',
             'md5':
-            'eae678c04ed3b3f89672052fdc0c5e10',
+            '662b347e1d2131b7a4dc5398365e2134',
             'cfg_path':
             'model.yaml',
             'ckpt_path':
@@ -91,9 +91,9 @@ asr_dynamic_pretrained_models = {
     "conformer_u2pp_online_wenetspeech-zh-16k": {
         '1.1': {
             'url':
-            'https://paddlespeech.bj.bcebos.com/s2t/wenetspeech/asr1/asr1_chunk_conformer_u2pp_wenetspeech_ckpt_1.1.2.model.tar.gz',
+            'https://paddlespeech.bj.bcebos.com/s2t/wenetspeech/asr1/asr1_chunk_conformer_u2pp_wenetspeech_ckpt_1.1.4.model.tar.gz',
             'md5':
-            '925d047e9188dea7f421a718230c9ae3',
+            '3100fc1eac5779486cab859366992d0b',
             'cfg_path':
             'model.yaml',
             'ckpt_path':
diff --git a/paddlespeech/s2t/exps/u2/bin/quant.py b/paddlespeech/s2t/exps/u2/bin/quant.py
index 225bbf6db..c38134c57 100644
--- a/paddlespeech/s2t/exps/u2/bin/quant.py
+++ b/paddlespeech/s2t/exps/u2/bin/quant.py
@@ -39,7 +39,6 @@ class U2Infer():
         self.preprocess_conf = config.preprocess_config
         self.preprocess_args = {"train": False}
         self.preprocessing = Transformation(self.preprocess_conf)
-        self.reverse_weight = getattr(config.model_conf, 'reverse_weight', 0.0)
         self.text_feature = TextFeaturizer(
             unit_type=config.unit_type,
             vocab=config.vocab_filepath,
@@ -81,6 +80,7 @@ class U2Infer():
             xs = paddle.to_tensor(feat, dtype='float32').unsqueeze(0)
             decode_config = self.config.decode
             logger.info(f"decode cfg: {decode_config}")
+            reverse_weight = getattr(decode_config, 'reverse_weight', 0.0)
             result_transcripts = self.model.decode(
                 xs,
                 ilen,
@@ -91,7 +91,7 @@ class U2Infer():
                 decoding_chunk_size=decode_config.decoding_chunk_size,
                 num_decoding_left_chunks=decode_config.num_decoding_left_chunks,
                 simulate_streaming=decode_config.simulate_streaming,
-                reverse_weight=decode_config.reverse_weight)
+                reverse_weight=reverse_weight)
             rsl = result_transcripts[0][0]
             utt = Path(self.audio_file).name
             logger.info(f"hyp: {utt} {rsl}")
diff --git a/paddlespeech/s2t/exps/u2/bin/test_wav.py b/paddlespeech/s2t/exps/u2/bin/test_wav.py
index 2e067ab6b..d12ea3646 100644
--- a/paddlespeech/s2t/exps/u2/bin/test_wav.py
+++ b/paddlespeech/s2t/exps/u2/bin/test_wav.py
@@ -79,6 +79,7 @@ class U2Infer():
             xs = paddle.to_tensor(feat, dtype='float32').unsqueeze(0)
             decode_config = self.config.decode
             logger.info(f"decode cfg: {decode_config}")
+            reverse_weight = getattr(decode_config, 'reverse_weight', 0.0)
             result_transcripts = self.model.decode(
                 xs,
                 ilen,
@@ -89,7 +90,7 @@ class U2Infer():
                 decoding_chunk_size=decode_config.decoding_chunk_size,
                 num_decoding_left_chunks=decode_config.num_decoding_left_chunks,
                 simulate_streaming=decode_config.simulate_streaming,
-                reverse_weight=decode_config.reverse_weight)
+                reverse_weight=reverse_weight)
             rsl = result_transcripts[0][0]
             utt = Path(self.audio_file).name
             logger.info(f"hyp: {utt} {result_transcripts[0][0]}")
diff --git a/paddlespeech/s2t/exps/u2/model.py b/paddlespeech/s2t/exps/u2/model.py
index d093821d8..5b7654d4a 100644
--- a/paddlespeech/s2t/exps/u2/model.py
+++ b/paddlespeech/s2t/exps/u2/model.py
@@ -337,6 +337,7 @@ class U2Tester(U2Trainer):
         errors_sum, len_refs, num_ins = 0.0, 0, 0
         errors_func = error_rate.char_errors if decode_config.error_rate_type == 'cer' else error_rate.word_errors
         error_rate_func = error_rate.cer if decode_config.error_rate_type == 'cer' else error_rate.wer
+        reverse_weight = getattr(decode_config, 'reverse_weight', 0.0)
 
         start_time = time.time()
         target_transcripts = self.id2token(texts, texts_len, self.text_feature)
@@ -351,7 +352,7 @@ class U2Tester(U2Trainer):
             decoding_chunk_size=decode_config.decoding_chunk_size,
             num_decoding_left_chunks=decode_config.num_decoding_left_chunks,
             simulate_streaming=decode_config.simulate_streaming,
-            reverse_weight=decode_config.reverse_weight)
+            reverse_weight=reverse_weight)
         decode_time = time.time() - start_time
 
         for utt, target, result, rec_tids in zip(
diff --git a/paddlespeech/server/engine/asr/online/python/asr_engine.py b/paddlespeech/server/engine/asr/online/python/asr_engine.py
index 67bbb4d48..536ffe0a9 100644
--- a/paddlespeech/server/engine/asr/online/python/asr_engine.py
+++ b/paddlespeech/server/engine/asr/online/python/asr_engine.py
@@ -580,6 +580,7 @@ class PaddleASRConnectionHanddler:
         self.update_result()
 
         beam_size = self.ctc_decode_config.beam_size
+        reverse_weight = getattr(self.ctc_decode_config, 'reverse_weight', 0.0)
         hyps = self.searcher.get_hyps()
         if hyps is None or len(hyps) == 0:
             logger.info("No Hyps!")
@@ -613,7 +614,7 @@ class PaddleASRConnectionHanddler:
         # ctc score in ln domain
         # (beam_size, max_hyps_len, vocab_size)
         decoder_out, r_decoder_out = self.model.forward_attention_decoder(
-            hyps_pad, hyps_lens, self.encoder_out, self.model.reverse_weight)
+            hyps_pad, hyps_lens, self.encoder_out, reverse_weight)
 
         decoder_out = decoder_out.numpy()
         # r_decoder_out will be 0.0, if reverse_weight is 0.0 or decoder is a
@@ -631,13 +632,12 @@ class PaddleASRConnectionHanddler:
 
             # last decoder output token is `eos`, for laste decoder input token.
             score += decoder_out[i][len(hyp[0])][self.model.eos]
-            if self.model.reverse_weight > 0:
+            if reverse_weight > 0:
                 r_score = 0.0
                 for j, w in enumerate(hyp[0]):
                     r_score += r_decoder_out[i][len(hyp[0]) - j - 1][w]
                 r_score += r_decoder_out[i][len(hyp[0])][self.model.eos]
-                score = score * (1 - self.model.reverse_weight
-                                 ) + r_score * self.model.reverse_weight
+                score = score * (1 - reverse_weight) + r_score * reverse_weight
             # add ctc score (which in ln domain)
             score += hyp[1] * self.ctc_decode_config.ctc_weight
 
diff --git a/paddlespeech/server/tests/asr/online/README.md b/paddlespeech/server/tests/asr/online/README.md
index e1e4d9506..1d7fa8824 100644
--- a/paddlespeech/server/tests/asr/online/README.md
+++ b/paddlespeech/server/tests/asr/online/README.md
@@ -11,8 +11,8 @@ This document introduces a client for streaming asr service: microphone
 ### 1. Install
 Refer [Install](https://github.com/PaddlePaddle/PaddleSpeech/blob/develop/docs/source/install.md).
 
- **paddlepaddle 2.2.1** 或以上版本。
-It is recommended to use **paddlepaddle 2.2.1** or above.
+ **paddlepaddle 2.4rc** 或以上版本。
+It is recommended to use **paddlepaddle 2.4rc** or above.
 You can choose one way from meduim and hard to install paddlespeech.
 
 
diff --git a/paddlespeech/server/tests/asr/online/README_cn.md b/paddlespeech/server/tests/asr/online/README_cn.md
index 46dff250e..403216369 100644
--- a/paddlespeech/server/tests/asr/online/README_cn.md
+++ b/paddlespeech/server/tests/asr/online/README_cn.md
@@ -10,7 +10,7 @@
 ### 1. 安装
 请看 [安装文档](https://github.com/PaddlePaddle/PaddleSpeech/blob/develop/docs/source/install.md).
 
-推荐使用 **paddlepaddle 2.2.1** 或以上版本。
+推荐使用 **paddlepaddle 2.4rc** 或以上版本。
 你可以从 medium，hard 三中方式中选择一种方式安装 PaddleSpeech。